This is extremely annoying and has been a problem for several years with the QC. It's hard to understand why this hasn't yet been fixed. In these corona times there are a lot of Teams meetings - so this is even more annoying than before at the moment.
Tried this but doesn't help:
Really considering switching to another brand. Please fix it! It has been a problem for too long now.
As mauviles put it:
"This should work transparently with no action needed from the user -- simply overlay the notification sound over the current sound. This requires a software solution and as such. I request Bose to recognize this bug in their product and work with Microsoft to resolve it."