Can you confirm that you installed all drivers for the Framework. If I remember correctly, the fingerprint reader will heat up as you are describing if the driver is not installed or crashes. Since you are using a form of linux, I’m not super familiar with how to install the drivers or what packages you would need, but you can check this topic for more info on that.
Fingerprint scanner compatibility with linux (ubuntu, fedora, etc) - Framework Laptop / Linux - Framework Community
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