I have exactly the same issue, have a map in a tab and the map is greyed out and a small section appearing top left only. Any solutions apart from the ‘visibility:hidden’ (which doesn;t work for me).
Hi Jack… I have chosen a different solution (not related to the fault above, but just better suited to my needs), and have uninstalled the plugin, so cannot confirm the fix.
Actually, just quickly reinstalled it and it seems to be working ok.