If I have a multifield with an image field and a term reference, and have two MFs, save the node, then edit again, then remove the 2nd MF, then 'add another item' I get the item I just removed added back.
See attached GIF.
1.0
User interface
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
We came across this on a Backdrop site using multifield and the last patch here was successful. It's been merged into the Backdrop version and will be included in the next release there. Marking RTBC here as well.
https://github.com/backdrop-contrib/multifield/commit/dfbef95c3d23d92dbc...