Waldo Bresh

I have a 2020 1500 LT( 8 speed trans) with only about 1500 miles on it...mostly city driving so far (25~40 mph). The auto stop worked fine at first, even in semi cold weather...worked enough to make it noticeable but I decided to leave it on to see if I could get used to it. Around 800 miles it stopped working, like others have said, can't say I miss it terribly but wondering what is wrong. Probably crazy but about the same time I noticed the auto climate control system acting wacky. I have it set at 70 degrees...when I start the truck it will blow full cold until the truck gets warmed up and then the air obviously warms up...in my 2015 Sierra it would not blow air until the engine was warm enough....and lastly, seems a little rough (transmission) when rolling through traffic at 28-35 mph, like it can't find the gear it wants. Anybody seeing all these symptoms in a newer 1500?