Since installing the new Beta released yesterday seeing the launcher crash when exiting apps, i. e the icons and widgets all disappear for about 10 seconds before coming back, has happened about 8 times since install. Never happened on the previous beta..
I've not had any problems like this, however I do perform a Wipe Cache in recovery mode 3 times after each beta update. Some times a full reset can clear these issues, but a reset should be a last resort.