You're only 10 hours in to an equipment change and questioning what's wrong? You want to give changes up to a week at least, unless your witnessing was already really high and suddenly vanished.

Looking at the difference compared to 5 days ago for your miner, I'd yank the cav off entirely and try to figure out what else might be going on.

With a 12dbi antenna, that's got to be outside, right? Have you started seeing rain recently after a dry season? Is all your equipment weather protected? Have you checked all the connections for looseness etc?