Yes, I had that same difficulty with the web in the cavern. Was most disappointed that the matriarch spider just stayed hovering in thin air rather than plummeting to the ground when I destroyed the web.
And I’ve seen some repeating dialogues too, eg with Edowin’s tadpole and Volo in the goblin camp.
Re disengaging goblins, I assumed they had the rogue ability to disengage as a bonus action? I’m sure that one of the 5e experts on this forum will know whether this is expected.
I did notice a few issues with the following behaviours in patch 7, too, and felt I had to manually keep my party together more, but nothing I was absolutely sure about.
