CarPlay and Sony car stereo

Hopefully someone has some insight on this issue…I recently purchased a Sony XAV-AX4000 stereo that was professionally installed. I have had CarPlay issues from day one. Connectivity has been spotty at best, but has improved since I updated the stereo to 1.25.07 firmware. Phone is a iPhone 12 running iOS 16.5. Most features and connectivity is ok at this point with the exception of navigation. I was able to use the stereo for navigation for approximately 1 month with accuracy, but was having to constantly reset network and or location settings to get it to work. Now I inconsistently have navigation working with most times the CarPlay and phone being frozen in the last known location. If I disconnect the phone from CarPlay, my location is instantly updated and navigation on the phone works as normal. If I reconnect to CarPlay, it’s a 50/50 chance on whether it will work. Sometimes it does, sometimes it freezes, sometimes my arrow just goes floating off into space, or sometimes it returns to my last know location. I have made several calls to Sony customer service with no help, and several trips to my cell phone service provider without any resolution. Since it has worked some in the past, I’m not sure if it’s a hardware problem with the stereo, or the phone. Installer has agreed to replace the stereo but today told me there are known issues with CarPlay currently regarding connectivity and navigation when it comes to some stereos and that it’s a software/update issue. Phone provider states it must be a stereo issue since the phones navigation works when not connected to CarPlay. Either way, navigation via my phone in my car is unreliable at best and is useless to me as is. I’m a home health professional and spend a lot of time driving to different areas/ locations aka why I upgraded my stereo. Just wondering if anyone else has any better insight to this issue.