I've experienced so many Teams bugs over the past few years that it became a running joke. Didn't keep a list though, but by far the buggiest piece of software I had to use on a daily basis.
Also just... a horrible piece of software? Dealing with multiple organisations was such a pain. When I was using it I never got notifications from the other organisations except by email sometimes many hours later. I'm not sure if it's a missing feature or a bug. Whatever - same effect.
It also liked sometimes randomly and continously consuming bandwidth - I'm not sure if that bug ever got resolved or what it was actually doing.
I've never had to use teams over multiple organisations, but I do remember that it did not support multi-account until much further down the road.
I think if I had to use teams on multiple accounts simultaneously, I would have loaded the web app in separate firefox multi-account containers. (I do that at home to keep all of my work and home accounts separate and it works like a dream. It's probably the one feature you can show to get people to switch away from chrome when you show it to them.)
I'm unaware of the bandwidth usage on MacOS & Windows since I've always just used the building's connection. Teams on my Android phone hasn't seemed to cause any bandwidth issues though.
Also just... a horrible piece of software? Dealing with multiple organisations was such a pain. When I was using it I never got notifications from the other organisations except by email sometimes many hours later. I'm not sure if it's a missing feature or a bug. Whatever - same effect.
It also liked sometimes randomly and continously consuming bandwidth - I'm not sure if that bug ever got resolved or what it was actually doing.