Deduplication on volumes doesn't work all the time, Start-Dedup job does nothing.

Any ideas on this?

Winserver (2022) deduplication seems to be brittle.  Works most of the time but sometime it stops and ceases to function.

Been doing some testing to see how much space we could save using deduplication by loading a volume (VHD) with test data and attaching it to a winserver VM and testing dedupe on the that volume.  Most of the time it works but some times Start-DedupJob completes within minute and does nothing and it refuses to do any work.  Nothing in the event logs indicate any problems with it.

Disabling/enabling dedupe and attempting garbage collection has no affect, The only way to get it working is to format the volume again and load data, reenable dedupe and start testing again.  If that fails remove the dedupe feature completely and reinstall it.