For the "can't sleep anymore" issue - Its the wagon. 9/10 times it'll more than likely be the wagon, with the other time being something related to the game, items, and when it takes an item away from you suddenly, or you lose it unnaturally (releasing it yourself) - Which can be fixed almost immediately by playing around with another item.
the wagon variant must be saved and reloaded, though you can avoid having that by not driving the wagon, if you want to use it, just have the deer follow you instead, for now. (at least the deer isn't like the horse was, the horse identified as an Apache attack helicopter, and used your items as ammunition)
For the later half, I recommend the same to you as the person who replied to you, Please head over to the discord, if you haven't already, and dm me, particularly with the save file that is having trouble - I have ideas on what it is, but until I see it, I can't know for sure, Once that's handled, I can relay the same info to you as I do to everyone I try and help, between what seems to be accurate, and speculation gathered from others and myself