dashboard with speedometer not displaying when lights are on

With the pandemic, I didn't drive the car often and roughly driving on 1 to 2 times a week for the groceries. I noticed that the left panel with speedometer, gas, gear info was totally off when I had the headlights etc. on (manual or auto) last night. This did not affect the right panel with consumption, temperature control. That panel was on all the time. To see the panel display, I had to turn off the lights. To drive that way would be very dangerous at night, so I drove without the speedometer for the short trip I was on. Then when I drove the car this morning, the panel displayed the info normally no matter I had the lights on or not.
Since it happened once, I am afraid it would happen again. Do you know what has caused this and if there is a simple fix without going to a shop? My car is a generation 2 Prius.

Thanks,