I have a 3090 FE when idle I hit 40c and when gaming I hit about 66c.
I just added two USB monitors and when I turn them on at idle I hit 415c on Cam while on my own system monitor soft wear I hit 41c. the cooling fan on the GPU does not turn on which indicates that GPU is within correct temperature , when gaming it shoots up to 476c. on cam software
I think it's a glitch in your software