I don't crash but I also get annoying freezes when I am caught by a guard and in some other situations where many items get moved/scanned. I just whipped up a small addon for testing purposes, which throttles the event callbacks on single slot updates.
You can download it
here.
You then need to add
Code:
## DependsOn: LibInventorySingleSlotUpdate
into the addon manifest of every addon that registers for EVENT_INVENTORY_SINGLE_SLOT_UPDATE.
It may or may not reduce your crashes.