Additional chat-related features and issues within Microsoft Teams for business
I turned it off in File Explorer and it is now gone. Original text slightly modified below:
"Well, what I found was that turning off "Show recommended selection" (or something alike, my Windows is set to Dutch) in the privacy settings of Windows File Explorer (yes, explorer, not Teams) made this go away! Maybe this helps?
So to access this, start WindowsFile Explorer and click the three dots. Choose "Options" and the privacy section should be on the first tab."