A change to co-author permissions for adding table?

Testing in one app, upon adding a table via suggestion, I now get a 400 error code (as opposed to 403), with the same “no columns found” screen. However upon reloading, the new table appears to have been added.

On another app, I was able to add new tables the same way, without any errors.

However in both apps, I am now unable to delete any tables. I try to delete, it gives me a 403 error, upon reloading, the table is still there.