So myself and at least one other have this issue with the application. Sometimes we don't get the audible ring (when being called or making calls).
When making a call and it doesn't ring some times it will ring after the call. Sometimes it stops other times it doesn't you have to close Teams. As far as I have seen it does not happen when logged in to the web client. Issue with the web client is the blur background nor add back ground is there.
Using this online (Chrome) with a Aftershokz OpenMove (same headset used in the application of Teams and logging in to Teams it seems to work on every function.
I went back to the application and it'**** and miss.
These are my settings from Teams

I have a co-worker that seems to have hit and miss issues that person has conambo brand headset.
These are my co-workers settings

My Version of Teams: 1.4.008872 (64 bit) last updated 4/5/2021 I checked for updates yesterday 5/5/21
My Co-worker's Version of teams is 1.4.00.11161 (32 bit) Last updated 5/5/21
Both PCs are running Windows 190401.928