Used the procedure you indicated. Had to do it twice though and then no problems. Another worker had the same problem - again had to go through the procedure twice and now working fine.
I wonder if there is any progress with this issue?
I just spent 40 minutes waiting for the model to run, just to learn that I have this issue again and verifing 30 columns takes 15 minutes.
Meanwhile, here is a small trick for others having to deal with this issue:
SOMETIMES it helps to save the file under a new name, close Robot and reopen the file.