Product variations list loads all pages sequentially

[chrisKns]

Describe the bug
Reaching the end of the first page of the product variation list will trigger the load of all pages, one after the other.

It seems that the willDisplay cell of ProductVariationsViewController that triggers the next page load is called after the reloadData() for cells that are not visible.

This might be reproducible in other places where it has paged content.

To Reproduce

Steps to reproduce the behavior:

1. Go to Products tab
2. Select a product with more than 2 pages of variations (> 50 objects).
3. Scroll down to the end of the first page and stop
4. See that al of the pages are loaded one after the other

Screenshots

bug.mp4

Expected behavior
The product variation list should trigger the load of a new page only when reaching the end of the list

Isolating the problem (mark completed items with an [x]):

• I have deactivated other plugins and confirmed this bug occurs when only WooCommerce plugin is active.
• This bug happens with a default WordPress theme active, or Storefront.
• I can reproduce this bug consistently using the steps above.

Mobile Environment
Please include:

• Device: iPhone SE 2
• iOS version: iOS 15.2
• WooCommerce iOS version: 8.4.0.1

WordPress Environment

`
### WordPress Environment ###

WordPress address (URL): https://koninis.me
Site address (URL): https://koninis.me
WC Version: 6.2.0
REST API Version: ✔ 6.2.0
WC Blocks Version: ✔ 6.7.3
Action Scheduler Version: ✔ 3.4.0
WC Admin Version: ✔ 3.1.0
Log Directory Writable: ✔
WP Version: 5.9
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ✔
Language: en_US
External object cache: –

### Server Environment ###

Server Info: Apache/2.4.41 (Ubuntu)
PHP Version: 7.4.3
PHP Post Max Size: 8 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
cURL Version: 7.68.0
OpenSSL/1.1.1f

SUHOSIN Installed: –
MySQL Version: 8.0.28-0ubuntu0.20.04.3
Max Upload Size: 16 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ❌ Your server does not have the SoapClient class enabled - some gateway plugins which use SOAP may not work as expected.
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

### Database ###

WC Database Version: 6.2.0
WC Database Prefix: wp_
Total Database Size: 13.73MB
Database Data Size: 10.94MB
Database Index Size: 2.79MB
wp_woocommerce_sessions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_attribute_taxonomies: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_downloadable_product_permissions: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_order_items: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_order_itemmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_actions: Data: 0.08MB + Index: 0.11MB + Engine InnoDB
wp_actionscheduler_claims: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_groups: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_logs: Data: 0.06MB + Index: 0.03MB + Engine InnoDB
wp_commentmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_comments: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_ewwwio_images: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_ewwwio_queue: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_gla_budget_recommendations: Data: 0.22MB + Index: 0.14MB + Engine InnoDB
wp_gla_merchant_issues: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_gla_shipping_rates: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_gla_shipping_times: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_links: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_custom_fields: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_dynamic_segment_filters: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_feature_flags: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_forms: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_mailpoet_log: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_mailpoet_mapping_to_external_entities: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_newsletter_links: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_mailpoet_newsletter_option: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_newsletter_option_fields: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_newsletter_posts: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_newsletter_segment: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_newsletter_templates: Data: 2.52MB + Index: 0.00MB + Engine InnoDB
wp_mailpoet_newsletters: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_scheduled_task_subscribers: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_scheduled_tasks: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_segments: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_sending_queues: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_settings: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_statistics_bounces: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_mailpoet_statistics_clicks: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_mailpoet_statistics_forms: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_statistics_newsletters: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_statistics_opens: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
wp_mailpoet_statistics_unsubscribes: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_mailpoet_statistics_woocommerce_purchases: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_mailpoet_stats_notifications: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_subscriber_custom_field: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_subscriber_ips: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_subscriber_segment: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_mailpoet_subscribers: Data: 0.02MB + Index: 0.13MB + Engine InnoDB
wp_mailpoet_user_agents: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_mailpoet_user_flags: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_options: Data: 6.03MB + Index: 0.11MB + Engine InnoDB
wp_postmeta: Data: 0.17MB + Index: 0.17MB + Engine InnoDB
wp_posts: Data: 0.33MB + Index: 0.06MB + Engine InnoDB
wp_term_relationships: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_term_taxonomy: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_termmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_terms: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_usermeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_users: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_admin_note_actions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_admin_notes: Data: 0.05MB + Index: 0.00MB + Engine InnoDB
wp_wc_category_lookup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wc_customer_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_download_log: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_order_coupon_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_order_product_lookup: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_wc_order_stats: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_order_tax_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_product_meta_lookup: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_wc_rate_limits: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_reserved_stock: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wc_tax_rate_classes: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_webhooks: Data: 0.02MB + Index: 0.02MB + Engine InnoDB

### Post Type Counts ###

attachment: 17
customize_changeset: 1
mailpoet_page: 1
page: 13
post: 2
product: 8
product_variation: 83
revision: 12
shop_order: 11
shop_order_refund: 2
wp_global_styles: 1
wpephpcompat_jobs: 16

### Security ###

Secure connection (HTTPS): ✔
Hide errors from visitors: ✔

### Active Plugins (11) ###

Akismet Anti-Spam: by Automattic – 4.2.2
Docxpresso: by No-nonsense Labs – 2.6
EWWW Image Optimizer: by Exactly WWW – 6.4.1
Google Listings and Ads: by WooCommerce – 1.11.1
Hello Dolly: by Matt Mullenweg – 1.7.2
Jetpack: by Automattic – 10.6
MailPoet 3 (New): by MailPoet – 3.79.0
PHP Compatibility Checker: by WP Engine – 1.5.2
Increase Maximum Upload File Size: by Imagify – 2.0.4
WooCommerce Shipping & Tax: by WooCommerce – 1.25.23
WooCommerce: by Automattic – 6.2.0

### Inactive Plugins (0) ###


### Settings ###

API Enabled: –
Force SSL: –
Currency: EUR (€)
Currency Position: right_space
Thousand Separator: .
Decimal Separator: ,
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: –

### WC Pages ###

Shop base: #2670 - /index.php/shop/
Cart: #2671 - /index.php/cart/
Checkout: #2672 - /index.php/checkout/
My account: #2673 - /index.php/my-account/
Terms and conditions: ❌ Page not set

### Theme ###

Name: Storefront
Version: 3.9.1
Author URL: https://woocommerce.com/
Child Theme: ❌ – If you are modifying WooCommerce on a parent theme that you did not build personally we recommend using a child theme. See: How to create a child theme
WooCommerce Support: ✔

### Templates ###

Overrides: –

### Action Scheduler ###

Complete: 141
Oldest: 2022-02-04 18:01:07 +0000
Newest: 2022-02-19 16:01:09 +0000

Pending: 1
Oldest: 2022-02-19 18:01:08 +0000
Newest: 2022-02-19 18:01:08 +0000


### Status report information ###

Generated at: 2022-02-19 16:01:32 +00:00
`