Any news about this issue?
I’ve been experiencing the same kind of slowdown, which seems mostly related to activities that involve reading logs/files (just a rough guess). I’m running a RPi4+SSD with very low load.
The issue likely appeared with the same release @lowrisk75 talked about but still persists today with 2021.11.5.
EDIT: a quick search here in Community revealed that my problem is purely related to RPi4 with external USB storage. This solution worked like a charm: Supervisor Logs Extremely Slow to Open - #22 by Veldkornet
Actually I thought I already applied this kind of configuration when I first setup Hassio… maybe it got wiped (or I inadvertently changed it) when upgrading Hassio.