The float notification after apk install scan cant disappear

https://attachment.freshdesk.com/inline/attachment?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NTA4OTI5NTA2OSwiZG9tYWluIjoiYXZhc3Rzb2Z0d2FyZS5mcmVzaGRlc2suY29tIiwiYWNjb3VudF9pZCI6MjA3MjI2fQ.L7yM0ZYTXDjHXk4_gMUEL7LH945U3haWtd3TDRKOTpA

It just dont disappear.
Using Redmi Note 4 MTK , MIUI 8.2.1 , Android 6.0 , the newest version of Avast Mobile Security from Google Play.

Hi, do you use any launcher app?

Using original launcher from MIUI official rom

Hi, according to some Xiaomi forums your issue could be related to a kind of aggressive battery saving that MIUI uses.

Please try the following:

  • go to Xiaomi security app → Permissions → Other permissions → Avast Mobile Security → Display pop-up window → Accept
  • go to Xiaomi security app → Permissions → Other permissions → Avast Mobile Security → make sure it is allowed to run

You can also try to follow instructions from this article:
https://www.androidcentral.com/how-fix-push-notifications-miui-8