Its probably the same issue I have that I typed above your post, maybe the Dragons, Titans, Demons, and Seraphim arent added to the game yet, so when the encounter triggers for them, they crash you out ?
You can test this out by skipping past the dragon's if you have the house for them (just hold down either left shift or left ctrl, cant remember which, this makes you sprint and skip encounters), to bypass the Dragons and then see if the Titans spawn for you.
I would do that, but out of money to afford the Titan housing/building and I am a stickler of going by order, so dont want to skip over dragons (rather wait till next update and see if its fixed).