Rather than a full reinstall you can do a bit of a check on if there is something with your userdata that is causing it by temporarily resetting that. I’m at a loss on what is going on here at this point. With refresh rate switching off it should remove the TV doing stuff from the equation and Kodi looks pretty normal in your logs.
Let’s test with Kodi default settings. Enter the following commands with an SSH connection.
systemctl stop mediacenter
mv ~/.kodi ~/kodi.bak
systemctl start mediacenter
If needed you can restore:
systemctl stop mediacenter
mv ~/.kodi ~/kodi.bk2
mv ~/kodi.bak ~/.kodi
systemctl start mediacenter
If your original setup was restored as expected and you want get rid of the unneeded clean install you can delete that with the following command.
rm -r ~/kodi.bk2