The current test flight build, 1.4.6 (105), is the same as the public release, so no need to install the public version unless you want to re-install just for the heck of it. (I would try that if nothing changes following the troubleshooting steps below)
I hope you meant10 seconds here and not 10 minutes…
Try turning on Restricted mode, switching to the default theme, and force quitting to see if anything improves. Other troubleshooting steps are here →
