So you've added the exception for all clients affected and it's still not working?
If it is truly a bug and the latest release doesn't fix it, than I would call support.
I'm curious if as a test you completely uninstalled/reinstalled the latest version on one affected client to see what the result is. Perhaps it is an upgrade type bug which does not affect a clean install.
Other than adding an exception, turning off the notification, or disabling tamper protection, I don't know that there is much else that can be done. Especially if it still a bug in the latest release. Support would need to rectify.