Did you found any solutions for this bug?
I have the same problem. My SRW-S1 LEDS stop working after few laps or after a spin. I'm runnning rfactor2 usb2.0, window 7
The boutons stills works, only the LEDS stop working.
The only way to have the LEDS work again (for a couple of laps) is to reboot the computer.
Thanks