All the fixes for 9.4.1 can be found here:
I couldn't see anything listed for One Drive in that list.
I've also taken a look at the full list of change requests and couldn't see a reported issue for One Drive sync issues. Did you have a reference number either a support case or perhaps a defect number so i can chase it up?
There is testing and improvements being made to the way Content manager integrates with Office 365. There are however situations and environmental configurations that can lead to performance issues and the development team aim to rectify those.