Like the title said, all the robos take a long time dropping loot when there is lots of lag.

Makes sense. Lag means that some ticks get skipped. As such, it takes longer for server-side animation progress to catch up and sync.

That being said, FAAL (the backend API built into CA, and on top of GeckoLib) will be rewritten to adopt an event-queue handler-type system to effectively eliminate/mitigate the effects of lag on animations in 0.13.0.0.