"m.mentions"."user_ids" seems to cut server part when special symbol exists

[alexander-potemkin]

Steps to reproduce

1. Send message from Element Desktop (ED), mentioning some users.
2. Edit it from ED.
3. ED will generate incorrect user logins in m.mentions - just the @user - missing server part (including : and following) if user id is in the following format: @user/department:company.co

Outcome

What did you expect?

I would expect proper full user id's, as otherwise Element X can't process it - see element-hq/element-x-ios#5010 (comment)

What happened instead?

only @user part ended up in that part.

Operating system

Any

Application version

Element version: 1.12.8 Crypto version: Rust SDK 0.16.0 (8471012), Vodozemac 0.9.0

How did you install the app?

Official site

Homeserver

No response

Will you send logs?

No