Missing spawns on some quests

[TheImpossibleDream]

This reset I noticed so far two quests with little to no monsters/boss, exiting and re-entering something that usually fixes this did not work. So far it's happened on bats and vegapygmy quest in tangled woods. I'll keep an eye out for more.

[Helge]

Also noticed this problem in the Marching dead quest.

[Gennedy]

Had this problem on the Riser quest the other night, on the first invasion part.

[Luke Danger]

Sand Reefs didn't have the boss spawn for me. :(