Android Auto disconnects are usually solvable once you isolate wired vs wireless. Start with cable/port checks for wired issues, rebuild pairing for wireless issues, and ensure battery optimization ...
Why phone restarts randomly is a common frustration for users, often caused by thermal stress where processors exceed 90°C, triggering automatic shutdowns to protect internal components. Random reboot ...
Updating your Android phone is a necessary evil to make sure the operating system is up to date and safe, but make sure you do these two things.