If I had a single bleep il be looking at the tips mate a carp could be trying to get rid of the hook maybe been on a while. I try to set the bivvy up as close to the rods as I can if it’s dark just need a flick on the torch to check, and I have the rods at slight angle to the water a bit like quiver tipping. Always near the rods even when I’m in a hot tub 😂