I need to switch on -> off -> on the "Capturing Hardware" for it to work

Hello,
First, I'm sorry because I don't know if I'm in the right category, I don't know if it's an hardware or software problem...

I created my own "ambilight" with a Rasperry Pi 1 (model 2011), apa102 leds, HDMI Splitter and a USB Video Capture.
I use Hyberbian on my rasperry.

It works and the result is impressive !

But, I'v a problem... When I reboot the Rasperry, it doesn't work anymore.
To fix it, I have to go to the "Capturing Hardware" category (in the hyperion web interface), uncheck then recheck the "Activate" field.
After that, it works again, but I have to do this every time I restart.

Do you have any idea where the problem comes from?

This is the logs after a boot : https://pastebin.com/2RvTw10i

Thank you

Of course

This is the debug log just after a boot : https://pastebin.com/wsTXa3d1

And that's after switching 3 times for it to work, if needed : https://pastebin.com/WGiAZsm6

I fixed it by adding a delay on the script wich start the hyperion service (/etc/systemd/system/hyperion.service)

[Service]
ExecStartPre=/bin/sleep 30
ExecStart=/usr/bin/hyperiond

I don't know if it's the best solution, but I don't know what are you talking about a "service dependency" on my grabber.

Anyway, thank you for you help, thank to you I know the problem is my grabber is not ready quickly enough.