Microsoft Teams is dog shit
That’s all.
EDIT: Thank you all for detailing your experience with, and hatred for, this miserable product. Your display of solidarity is inspiring. Now, say it with me:
Fuck Microsoft
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Today it decided to not mark messages read after I had opened them.
Omg are you me?
That happens to me regularly. Plus it will have different read statuses in the channel list, pins, and notifications.