[deleted] It's an upstream bug: https://github.com/GrapheneOS/os-issue-tracker/issues/1461
You will encounter the same things on Stock OS or other alt OSes. AOSP doesn't give much love to secondary user profiles, and most upstream bugs that people on GrapheneOS face are due to the usage of secondary profiles due to them having been ignored by AOSP for the most part.
With the release of the Pixel Tablet, Google seems to be paying a lot more attention to secondary user profiles, so I expect to see a rapid increase of fixing these bugs in the future.