User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-1807002-20210111174428/@comment-1038387-20210111190337

Not just tied to infoboxes: one of the editors tends to change some of the spaces between parameter name and = into non-breaking spaces, which makes it a new, non-existent parameter, "Parameter    nbsp nbsp nbsp nbsp =". That could be related to your issue. Removing all the spaces (and optionally, manually reinserting them) fixed that for me.