Yeah, the apps thing is a pain, but a soft reset (Holding power button until it resets) fixes it for me whenever it happens. I don't know about the weather, haven't really used it.
But, I did recently have 2 other things happening.
1 - On a trip when my wife connected her phone and used the MP3 Bluetooth, and my phone was still connected with CarPlay her audio would start cutting in and out. Disconnecting my phone and turning off the 2-phone option seems to have corrected it, will keep an eye on this and see if it returns.
2 - Within the last week or so, occasionally the audio acts like an announcement is being made, the volume is reduced and highs are reduced, and after some random amount of time it returns to normal. At one point rebooting my phone seemed to have temporarily fixed it, and I have gone into the device manager and unchecked the carplay for my phone and problem seems to stop. So, I think it's something with my phone. I'll post back if I ever figure it out. Has anybody else had the same experience?