Manual scans don't show result notification

Since yesterday after I updated to 19.6.2383 (build 19.6.4546.494), when I manually scan a file I get the notification pop-up about the result only the first time after the PC reboot, then it doesn’t work anymore and I need to open the Avast window (by clicking on its icon on the notification bar) and sometimes it won’t even show any result at all, especially if the Avast window wasn’t already opened before the scan.

Thanks already reported.
https://forum.avast.com/index.php?topic=228012.msg1510714#msg1510714