Hmm. It may indeed be related to being in a LMOE shelter, then. I normally make my base in a firehouse and use the metal lockers for storage, and never had any problems. In the LMOE shelter, I just plop everything on the table in the room to the southwest. I’ll replace the table with storage lockers and see if that makes any difference.
Edit: Nope. Replaced the table with lockers and sleeping/crafting is still stuffed. I put my character to sleep, got up, made lunch, ate a salad while staring at my frozen screen, and about halfway through my meal my character finished sleeping. Not playable, I’m afraid.