Hi everyone, I've run into a bit of a strange issue with my lights over the past couple of months. For background, I've been running on this setup for the past 3 years roughly, it's a Shimano DH-UR705 hub, wired up to a B+M IQ-X, with a toplight line small taillight. I had the headlight replaced under warranty in the summer as it had failed and stopped illuminating.

The problem: Every time I start a ride, the lighting system takes about 30 seconds of riding at 20-30kmph before it starts working. After that though it works completely fine for the rest of the ride. I've checked all my wiring, connections, and have re-wired the connection to the hub to ensure everything has a solid connection. Before this, the lights would turn on immediately as soon as I started riding. Additionally, on longer rides in daylight when I sometimes turn off the lights using the button on the headlight, they will spontaneously turn on again for no apparent reason.

I haven't been able to find any other threads anywhere on the internet that quite describe this issue, I was wondering if anyone has any insight on what might be the problem here? Is it time to get a new hub? I've ruled out the light as the problem just due to the fact that it's an almost brand new unit.

Thanks!