We have added a tab to a channel which is linked to a SharePoint list that has a Power Apps customised form. When opening an item to view or edit, none of the usual options to save / cancel / edit are available, so the user basically can't interact with the form at all.

This wasn't a problem until quite recently so I suspect it is related to a recent version update (currently on 1.3.00.21759). I've attached two screenshots to show how this should look (when I open an item to edit in Edge) and how it instead looks in Teams when performing the same action.

It is more than just a single form / list this is impacting - as far as I can tell it is a bug with Teams and not with our customised forms or SharePoint lists.