Stalling issue in L2

Odd issue today. Truck seems to run ok. Today at a stop light I shifted into Low 2 and the truck stalled immediately! Very odd.
When I got home it happened again and every time I shift the L2 it stalls! I’m not talking about 4 wheel low, just a regular transmission shift.
What may or may not be connected to this issue... the light on my “D” on the dash is out. “PRND”. It’s been out since I bought it. No big deal. However just a few days ago, when I shift to “D” the light for “R” illuminates?! Very odd. And not the stalling while in L2. help. Anyone ever have this issue? Could it be related??

 

Check for trailer wire short?

wait it would blow a fuse.....