I am working directly with MS Office MAC support and have sent multiple sysdiagnose files and samples to both Apple and MS for this issue. They are aware it exist but no fix or workaround yet. It has to do with rendering of MS specific fonts that are embedded into the Office apps. The support tech I am working with has been able to reproduce the same issue on his own machine and test machine. If I get an update I will post here first.

I'm getting this same thing very annoying everytime I unlock phone. This beta seems buggy on all devices. I also can't can't connect Watch to MAC for unlocking. I have submitted bug report.

As soon as this started my watch can no longer unlock my Mac and Mac can no longer see the watch for unlocking after deselecting and re-selecting. All started at the same time.

I have been working with MS and have sent multiple log files from Outlook and OS regarding this issue. So far I have been running Mac Mail alongside Outlook and delete the offending emails, force quit and re-open Outlook then go back to Mac Mail and undo the delete so a different email is selected so Outlook won't crash and I don't lose those emails for troubleshooting. I have sent those offending emails to MS on my open ticket as well. I will post any updates from MS.