@JPan I noticed you had the new SQL editor mode on in your video. For what it's worth, I flicked between both when testing and both were successful. 

Given that you're finding it's only happening on some fields, do you think this is to do with special characters within those field names, the data types of the fields, or something like primary/foreign key constraints etc? I guess you could find out what the fields that cause issues have in common. 

Nevertheless, it's interesting. Obviously, the long-term solution isn't to just flick back to the old-style editor. Given the rate at which the product moves, I have faith that the bug will be fixed in good time ☺️.

All the best,
BS