Office file cache problem with SharePoint online / OneDrive sync

We have configured a GPO to disable long term office cache and delete files right away. In registry, it is the value DisableLongTermCaching. 

This ceased to work a week or two ago completly. Thus our users are sometimes unable to open on-demand files synced from Sharepoint online through OneDrive client and they get various errors. The only solution to this is to manually delete office cache files stored in C:\Users\username\AppData\Local\Microsoft\Office\16.0\OfficeFileCache\0\0

Any other way to delete the cache now? Is it only bug from MS, or nice new feature?

Thanks!