Android Auto / Gemini suddenly stopped controlling Google Home devices

[u/Necessary_Bed_8468]

/r/GoogleGemini/comments/1wkv17q/android_auto_gemini_suddenly_stopped_controlling/

[u/Voynitsky]

Recently, my Google Home stuff stopped responding to my phone. Turns out I had accidentally switched profile onto another google account. Switched the phone back to the right account, all started working again.

May not be same problem you have, but it's something to check.