I'm confused

okay, so, I was doing a cursed mode run as one does, and since it's my second time, I was just testing things out. I had recruited leigh and wanted to do the rat hell quest, so I went to the first floor and recruited ernest, then I went to the ground floor and talked to papineu (idk how to write the name) and couldn't recruit him yet, so I just went back to my apartment. ernest talked about maybe recruiting him another day and leigh raided my fridge.

and then I got a game over.

it was so sudden, is it something to do with the fact I spent a day away from my house or that I didn't have food for leigh? though I definitely did have food, I just don't know what happened.

I'd like to know if it was my mistake or a genuine glitch, I wouldn't like to have that happen again in the future.