In upgrading to 2.2 there appeared numerous spacers that needed to be deleted. Got it, but..... does anyone understand what created them or where they come from? I have five pi's and done two upgrades and this one was 238 spacers. That is a lotttttt of clicks. Not looking forward to three more pi's.
This seems to be a known bug. You may as well wait for the fix before upgrading any others.