Having a new problem recently but i'm not even sure how to reproduce it properly so i'm gonna throw that in the wind.
Basically the way it feels, if i work on scene for some time, do a 2k+ render, stop it and start my 5k render overnight, the render crash after a few hours.
Checking at the moment, i only use +/- 80% of my ram overall (64gb). Also it's not constant, i rendered 5k last week without any problem...
It's hard to reproduce because it only happens after a few hours on 4k+ renders and i'm the only one in the company to update with every build (we also have different hardware).
I join the error message i had this morning and the mentioned log, if it's of any help.