4lo problem or not?

I have a 2010 rubicon automatic transmission and was out wheeling this weekend and noticed that when I was in 4lo and shifted from park to 2nd gear it would rev for a second before catching and start moving. It never got worse or better every time this happened during the trip. I wasn’t sure if this is something that is going to cause problems down the road and I should fix it right away or if it is normal or where to begin inspecting. I do not recall this happening on previous trips or in my last jeep. Thanks for any advice!


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