There have been various threads on this in the past covering the issue of android auto rebooting.
Solutions typically offered are clean the connections, get a new cable, go wireless. We have actually gone wireless in both cars using the Motorola MA1 and I’d say it’s great as long as you remember to keep an eye on the phone charging.
Anyway, to the weirdness. In the past I have never noticed a pattern. But in both our cars the android auto reboots on one section of road, every time I drive down it, in the same place and without fail.
How wierd is that. It is on open moorland and there are no overhead pilons. It happens here to me, just south of Blackburn https://maps.app.goo.gl/paw4ojJjx3a3q46x6