I have run into a few bugs trying to clear out taffington boat house. Less stressful was that the bloodbugs just kinda mellowed out and hung about, chilling and waiting to be shot in midair. Then after a reload because Mac Greedy decided not to give the password to Jacob's PC, they now are able to Matrix dodge all of my shots. I mean I am aiming and holding breath and can't hit anything.
To note I have 2 mods on. One modding the Survival mode allowing fast travel, saving, and wight carry and one modding legendary spawn rates +5%. However, none of these are meant to affect behaviors. Still it is sad that I either am able to 1 shot them all or never hit them.