Thanks for the suggestion Naranja. Aren't the two buttons (top and middle) the light switch?

I have a lightly-used 2018 Rad Mini. The headlight has recently been flukey. Sometimes it turns on and more often is not turning on. I've always turned on the headlight as follows: after turning on the display I hold down the middle and top buttons to turn on the light. Currently this doesn't always work. I have seen a video that suggests I might need a new wiring harness or possibly a controller. Could these be the cause, or should I look at something else first?