NbCheckbox does not uncheck when checked = false

[lookatitude]

Issue type

I'm submitting a ...

• [ x ] bug report
• feature request

Issue description

Current behavior:
NbCheckbox does not accept value (warning says it will be removed on 5.0.0, I'm running 5.1.0 value still remains there) and [checked]="false" does not work. I've tried to use [checked]="model.prop" where model.prop is a boolean and it doesn't work checkbox is always checked.

Expected behavior:
When [checked]="false" the checkbox should be unchecked

Steps to reproduce:
Create a checkbox in any form and add [checked]="false".

Related code:

 <nb-checkbox [checked]="false" formControlName="prop" fullWidth id="prop" name="prop">
        My property value: {{ model.prop }}
      </nb-checkbox>

-->

Other information:

npm, node, OS, Browser

Angular CLI: 9.1.8
Node: 12.16.1
OS: darwin x64

Angular: 9.1.11
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router
Ivy Workspace: Yes

Angular, Nebular

   "@nebular/auth": "^5.1.0",
    "@nebular/eva-icons": "5.1.0",
    "@nebular/firebase-auth": "^5.1.0",
    "@nebular/security": "^5.1.0",
    "@nebular/theme": "^5.1.0",

[jedmonsanto]

any status of this? have the same problem

[andreipadolin]

Hi @lookatitude , @jedmonsanto could you please share a bit more details with stackblitz for example.
I've made one for testing https://stackblitz.com/edit/github-w1ahc7
So seems input event [checked] happened before formControl initialisation and writeValue overwrite it with null or undefined I guess by default if it is not set before.