Thank you for your reply to my post. It is a very odd thing. I do have a TAZR installed and the rear tail lights are LED bulbs. Those work just fine. I swapped everything back to OEM and unmarried the TAZR. The side marker lights still do the same thing.
I noticed that the OEM side marker lights on my '22 Gladiator are not staying on when I use the turn signals. Sometimes they come back on when the turn signals shut off and other times they do not. Any suggestions on how to fix it?