Yeah, it helped  

I had already modify the ram allocation on advice of another player with the same issues, but he had advised me to put min and max values "-Xms6144m" and "-Xmx8192m". It did seem to lessen the number of crashes but they kept happening. This is my .json file. Should i modify it to exactly  "-Xmx6g", and remove the xms line ?

Time to encode in utf-8! 

I just encountered this bug today. After fiddling around I found that closing the window and reopening it can temporarily fix this bug. You have to grab the corpse by torso though. Hopefully this helps!

Then you will need to go through your mods one by one or in batches to find which is causing the issue