This is happening 8/10 tries, and I am not exaggerating these numbers. I have a small selection of mods installed and I am playing "The Ocean" in single player, the game runs fine. After exiting the game, doing other things, then launching the game and loading back into single player I notice most of the resources and any modded items are now gone, and at times my character will be grey/missing textures (most likely the missing textures is related to the specific mod). I'm unsure as to what I must do to get this to not happen if at all at this point.

Anyone have any advice or know a way around this, as of current I have to delete the save or kill and recreate my character to continue playing.