Turn off hyperion automatically when hdmi grabber display rainbow collors

Hello,
I'm new to Hyperion and this is my very first setup. I configured Hyperion to work in a raspberry pi zero + wled esp8266.
I also have a usb grabber that i bought from Aliexpress (link here for reference : https://fr.aliexpress.com/item/1005005359165194.html )

This video grabber displays a rainbow like image whenever there is no input source (ie when I turn of my source device for instance) and this prevents Hyperion from auto shutting down.

Is there a way around this in order to force Hyperion to shutdown then leds whenever the source is turned off and turn back on when it's back?

Thank you for your help

Perfect i will put this in place thank you Lord-Grey

Lord-Grey I can't find the "LED Visualization" settings section in my hyperion, could you show me where it is please. Thank you

[EDIT] I just had to activate advanced settings mode. All done thank you