Google Services excessive CPU consumption Android 7.0 on S8

[Android Central Question]

Hi there, since about mid November I am struggling with Google services (11.7.46, 11.9.51) consuming up to 30% of my memory, eating 3hours of CPU every day. The issue can be sometimes mitigated for several hours by restart. I switched off synchronization and location services, switched off google now, stopped synchro for Samsung account. but it does not help. The only thing that helps is a downgrade ('unistall updates') to version 11.5 but then my Google Inbox application does not work (notably, one of only few apps that cannot cope !). I guess this must be some 3rd party app - is there any way whatsoever how to identify which app is causing this?