Judging by the brightness I see, I’m guessing the bulbs have been swapped to aftermarket LED’s. More than likely a loose connection between the bulb housing and the ribbon or the LED itself is going out. Best to pull the cluster, clean things up with rubbing alcohol and reassemble. If that does not solve it replace the LED. About a 30min job depending on your skill level and knowledge of how to remove the dash pieces.
Just guessing and the direction I’d start so don’t hold me to it.
If you need a new LED best to replace them all so they match. Somewhere in the forum someone has listed out all the dash LED’s and where to purchase them.