Aahaa, omg priceless. Your response at first was like tough bug, then you're like omg... If they survived they could be in my oven. You're fine, they can get inside of the bark and it'll help them manage the temps.
Exactly, you both are okay as they're most likely just stuff that either feeds on decay or wood and stuff of that nature. I've seen them before especially if you had scorpions that would kill something and wouldn't finish it all the way off. They're probably harmless though I can't say for sure if you have the same ones that I've seen.
Also I'm sure they do sanitize the stuff, but they probably run into the same thing that you did as well.