I’ve had weird issues where one level wouldn’t get loaded at all, even with the right name and everything. I tried a lot of things. In the end, changing the name of the level made it work. I’m still not sure why.
It happened again suddenly with another level, I changed its name too and that fixed it. I was even able to change the first level to the original name and it still worked. I really have no idea why this happened. It feels like Unreal doesn’t like that precise name at that precise moment.