This is a long shot but has anyone seen this too?
This is the AggregateItemLocation table and the pictured column is supposed to (I think) update the date/timestamp when a transaction changes the qty available. I created an Inventory Status Change which moved the item to FAULTY. This has reduced the qty available in the same table, but the timestamp has not updated.
I can see other transaction types (Sales Order, Transfer Order, Item Receipt etc) do cause the date/timestamp to change.