In the FAQ’s about Tests we’ve performed on our x-series tags
Cooking an x-series in the oven
We decided to test our xIC tag’s compatibility with a gun safe called GunBox . We placed an xIC into a piece of raw chicken, which was then put inside a plastic bag and tested it with the GunBox safe. It worked! But, Amal got hungry and decided to cook it up with the tag inside. After cooking at 375F for 30 minutes, the tag was removed and tested with the GunBox, and it still worked!
My Experience
I don’t know what 375°F is in °C - 200°C ish, however, I have never sat myself in an actual oven but I have been in Saunas & steam rooms around 80°C and hot pools ( Spas and onsens ) at around 40 - 45°C; I never even thought about them, until you just mentioned it BUT they still work, so I would say there should be no issue for you.
unless you go over 200°C and then you might have some issues 