It has been ongoing for me for almost two weeks. At first I thought it could be my phone, but I got a new phone last week and it has been happening in the new one too. One crashes was system wide and caused the phone to reboot.
I suspected it could be a custom extension that I use (Control Panel for Twitter) but happens even while the extension is disabled.
Thank you! It appears it is fine here too, Mull is having issues still but it will probably be fixed only when they update.