Subaru Crosstrek 2018 Carplay

My Subaru Crosstrek 2018 requires that my iPhone needs to be plugged into the USB port for carplay to work. Many times it will work and carplay will launch. Unfortunately, many times it does not launch and the carplay button on the screen is greyed out or it launches and then immediately crashes. I am using an official apple lightning cord and I have tried using different ones. Is anyone else experiencing this or have any workarounds or solutions to this problem? I am using an iPhone X running on iOS 11.2.5