I run with a modded version of Skyrim but it's been fine up until Dawnguard, ever since then I seem to crash every 20 to 30 minutes without fail.

I took a look into the Papyrus logs and found this:

]PlayerActivateBed() IsCoffin =False.

This line seems to be repeated throughout 60% of my recent Papyrus logs but my last few hours of gameplay has been me running around Whiterun before level 10, killing bandits and not interacting with beds.

Any idea if this is a culprit?