Just FYI RE: CPU load during the freeze, for my issue: Frontend freezing since 19.1 update didn’t seem to cause a CPU spike, i have data from the last week every 15mins and there was no continuous high usage after the freeze.
My issue was fixed by removing a repo that wasn’t responding, this was most likely a new Kodi 19.1/OSMC 2021.8-1 issue however as i assume the repo was broken before the upgrade.