Thanks for the reply & suggestions.
I've tried disabling Power Mode which didn't help
The directory is local & contains under 300 files.
I also tried removing all directories within the app and noticed the high CPU is still occurring.
However, I've just noticed that I was using the snap version & thought I'd try the appimage instead.
No problems at all using the appimage version!
EDIT: This is kinda weird, if I pin the app and run it directly from the icon, the CPU spikes again. If I run the appimage from the CLI, CPU is fine.