C5 holding drifters

Hi,

Over the last couple of months i’ve noticed some odd behaviours with drifters. I used to simply triple scram the drifter with a frigate after the dreads had been agro’d and all was fine. Then even with the drifter agro’ing the dreads it would often swap and kill the frigate so I moved to the dread dual heavy pointing the drifter. My understanding was as long as this happened before 25% armor remaining it wouldnt leave. Recently the drifter about 20% of the time warps out at spawning, goes and sits at a wh for 2 minutes and despawns. I managed to catch it on a wh today and dual heavy pointed it but after approx 2mins it despawned anyways. This isnt for every drifter, wondering if anyone else has noticed this odd behaviour. I’m not a fan of a bubble, you would surely need a large to reach to the 20km spawn point and up to 60km for quarantines and that anchor/unanchor time is extreme.