New dryer smells like smoke when running?

Like the title says, I just put in a new washer/gas dryer today and the dryer already has a burning smell coming from it.

I did a short test run of both just to make sure they were working (they were empty for this) and everything was fine, no odors.

Now with a full load of wet laundry, there’s an intense burning smell coming from the dryer. Vent hose is new, gas connector is new, exhaust to the outdoors was cleaned a week ago. Any ideas what this could be? Is it an electrical issue within the wall?