no this doesnt happen during the sesonal hunts but before or after when i made my account and started looking aaround the site a uilis egg popped up i remember i made my account in the summer how did that happen. my freind had the same thing happen to her and a kuribie egg popped up for some reason. This usualy happens to newer acounts.

It's not possible for them to pop up outside of their season because they are completely disabled. It was either another egg that was mistaken as being seasonal, or maybe someone had a fake egg stumble coded into their profile.