aswbidsdrivera.sys using too much cpu since last update

dear Avast team

since last update, the drivers aswbidsdrivera.sys (through the System / ntoskrnl.exe process) is using too much cpu all the time,
like 5~20% cpu.

the cpu usage disappear if I disable and re-enable the Avast agents through the tray icon menu, but the problem come back later again.

processexplorer screenshot:

http://www.fafnirden.com/tmp/img/tmp/aswbidsdriverasys.png

Avast version: 17.3.2291 (build 17.3.3443.0)
VPS: 170412-0

OS version: windows 7 64but Pro SP1 (though not up to date with update, thanks to M$ being annoying)

update:

the cause seems to be most likely the (new?) Suspicious Activity agent/service.

disabling it seems to be enough to see the aswbidsdrivera.sys subprocess disappear from the system subprocess list as seen in processexplorer