Hi There,
I'm not aware of anything specific, but this sounds like a job for SQL Profiler. Can you run a trace, and see what the timestamps on the events look like?
My suspicion is that this is somehow tied in with queries against one of a few tables:
--AMS_ApplicationItem
--AMS_ItemRole
But, give it a shot and if you can't find an obvious culprit to regenerate indexes against, I would reach out to Technical Support for assistance.
Hope this helps!
Regards,
Cary