Some of our users reported that their Xiaomi MIUI 13(some models) Wireless Android Auto disconnects and reconnects at the moment when the cellular signal is out. We are working to find a way how to resolve such an issue.
But it looks like this MIUI 13 issue, and we need to wait for new updates. The same issue with Xiaomi MIUI 13 is in cars that support original Wireless Android Auto too.
- change the WIFI gateway in the Carsifi adapter to a Phone Hotspot
- try to downgrade MIUI to the 12 version.