As an IT person - I openly admit "Broken" IS a trigger word. I hate thinking that something I've built doesn't work correctly. It triggers me to Do My Job and fix the problem. And then, I Thank the person who pointed it out. Coding is a big messy world, things will break - people who report the errors are Helping you out! There's ZERO excuse for this bug being left uncorrected for so long. There are millions of people whose workflows involve having a window open in the background. It's not even a topic worth debating. Someone at MS is being lazy and/or living in denial about their own work/skills/abilities. Just get over it and fix it. Do your job.
Microsoft: We'd fix it, but we're too busy adding freaky looking Teams avatars that no one asked for or wants.