In the descent area of this seam there is a quest that can sometimes be spider themed, however reaching it requires breaking down untargetable webs. The "recluse spider" variant of the quest offered there also has the same problem.
Should all be fixed.
Annoying that those webs are no longer bashable.
They are bashable, but problem ends up being some are unreachable as their location. I've slightly tweaked a lot of these webs in few quests, but it helps if reports are precise in exactly which of the webs are not reachable.
It often ends up being just adjusting the placement of the objects by a tiny bit.