So I have gotten into a boot loop 3 times with a faulty fingerprint sensor.
My latest hack to get back in is to wet your finger just slightly when the I comes up with the green screen and press the finger to the fingerprint sensor. Booted right up for me.
YMMV - use very very little water….a tiny droplet is enough. My guess is that it’s short circuiting the fingerprint sensor check when moisture is detected.