Bug: [Android-demo]When you at someone in the group and the delete the at person,the page for selecting the at person pops up a second time.

[CongDuang]

What happened?

• Let me describe what happend.

  1. I entered the @ symbol in the input box, and the select personnel page popped up normally.
  2. Then I deleted the @ symbol, and the personnel selection page popped up again, which should be wrong.
  3. In single chat page,if input @ symbol,will also popped up the personel selection page.

What did you expect to happen?

1. I expect that when I enter the @ symbol, the page for selecting people will pop up normally, which is correct. But when I remove the @ symbol, the select person page should not pop up again, which is wrong.
2. in single chat page, i entered the @ symbol in the input box,not pop up personel selection page.

How can we reproduce it (as minimally and precisely as possible)?

Enter the @ symbol, successfully select the person, and click OK to automatically return to the previous page. Delete the person you just selected

Try a few more times

Anything else we need to know?

No response

version

```console $ {name} version # paste output here ```

Cloud provider

OS version

Android

```console # On Linux: $ cat /etc/os-release # paste output here $ uname -a # paste output here # On Windows: C:\> wmic os get Caption, Version, BuildNumber, OSArchitecture # paste output here ```

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