Front passenger's speaker cutting out in really cold weather

2018 CX-9 GT
This morning it was about 27 degrees F when I went to work. I noticed that the front passenger's speaker was cutting in & out and was scratchy when it came on. Probably a connection issue but I wanted to know if anyone else had ever experienced something similar. Car's still under warranty but it stopped doing it after the vehicle warmed up so it's probably going to be hard to replicate at the dealer. :(