Hi @IBN ,
Is it affecting all users or only some particular users have this issue?
Does it occur to folders in all Teams channels you've checked so far?
Is it a recently occurred issue? If yes, please check the Teams version by going to the ellipsis (...) menu next to the profile picture and selecting About > Version.
Besides, it's suggested to have a look at the Teams web client(teams.microsoft.com) and see if the issue can be reproduced there as well, this helps eliminate whether it's an issue with the Teams desktop client.
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