Hello, Gents. Sorry for the inconvenience.
Plesk Service Team is working on the issue. Solution will be delivered by the 10.4 MU#15, 10.2 MU#15, 10.3 MU#17 and 10.0 MU#12 next week.
Please install and check. Your feedback is quite appreciated. Thanks.
P.S. 10.4 MU#14 fixes one particular case with KAV but there are different cases when the issue can happen. It will be fixed next week.