After manually vacuuming, I turn off the pump to unseat the skimmer box lid. Then I kick the pump on, and this is what I see. If I backwash after I vacuuming, then I don't see this. I do find what I believe is sediment on the pool floor shortly after the pump kicks on. Links for videos showing the sediment are also posted. Not sure if the issues are related.
Return video:Dirt video #1:Dirt video #2: