Hard shift from 1st to 2nd when cold

I haven't done any harness troubleshooting. I have just been living with it. but, this morning, I let the Jeep warm up some before heading to work. I noticed that it shifted perfectly, and that is what prompted me to search for an answer.
 
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I have not looked through the harness. Everything else has been running so smoothly, I have been just living with it. Once it warms up, it's fine. This morning, I let it warm up some, and it shifted smoothly. That is what prompted me to search for an answer.
 
  • Like
Reactions: Wranglerfix