Hey Alexchadballs!
Sorry to hear that :/. It seems to be a bug that happens every time, and some other players have reported the same issue. We already have a fix for that, but it'll take a few days until we roll out the update. I suggest you don't enter the caves for a while hehe
But we're really glad to know you're enjoying Nova Islands :D
If you'd like to, consider joining our Discord server https://discord.gg/hDxyZ7A. We usually share news about the next updates there first, and it's also a good place for some tips, support and to share your ideas for the game :)