Discovered a bug that overwrites a chat — PM me please

I've discovered a bug that overwrites a one-on-one chat with a group.  

I did this in the Windows 11 Teams (free) app — and the effect is seen in Teams on Web & mobile.

I've a support ticket open but doesn't seem to be going to the right people. 

I'm pretty sure Microsoft would like to know about this bug before others do the same thing. 

Can someone from the Teams (free) please drop me a PM — I'm happy to provide a detailed description for how I did this.  Hopefully, a technician can fix my one-on-one chat.