Notification Problem

[maidoanchien]

The pop-up notification (or whatever it's called) lasts for so long.
E.g. when I pressed x in the recent app menu, a notification poped up (...MB cleared), it didn't disappear and stayed there for about 5 minutes.
I've been facing this issue since 20.8.20.
I thought it would be fixed in 20.8.27 but it wasn't.
20.8.27, Mi 9.
Btw, I tried flashing the rom again and formatting all data but it wasn't fixed.

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[Jocuba]

Have you tried this? Settings> additional settings> accessibility> physical> time to take action> default.

 

[maidoanchien]

Thank you very much.
I must have changed it sometime in the past.