Hi Andy,
This is most probably due to an upgrade of the Debian version, which changed the CPU “manager”;
Abe tried his best to explain here:
https://community.homey.app/t/sudden-cpu-frequency-drop-from-1-3ghz-to-0-9ghz-since-v13-3-0/156562/14?u=peter_kawa
https://community.homey.app/t/sudden-cpu-frequency-drop-from-1-3ghz-to-0-9ghz-since-v13-3-0/156562/26?u=peter_kawa
https://community.homey.app/t/sudden-cpu-frequency-drop-from-1-3ghz-to-0-9ghz-since-v13-3-0/156562/28?u=peter_kawa
