I'm also now going back to wondering if it's frequency related. Most of my testing before was on a joint 2.4/5GHz network, so I would have been on 5GHz. My wireless Android Auto box is also 5GHz-only. So it might be worth disabling 2.4GHz/6GHz on a network and seeing if it has the same issue.

mdapa any chance your university network is 5GHz and your hotspot 2.4GHz?

      Gilboboy Please report back if your Android Auto wireless is working. If Iam connected I have no possibility to change the WLAN Settings from Android Auto

          kebapfan I can confirm my Android Auto is still not working and disconnects every minute. I'll test later whether this is some kind of special case or 5GHz networks.

            After further testing, I'm almost certain this is related to the 5GHz band. By changing my home WiFi network to be 5GHz-only, the disconnects happened every minute, with it set to 2.4GHz/6GHz, no disconnects occur.

            My guess is the inconsistency we've seen is because if you have an access point broadcasting multiple frequency bands, it'd depend which one you were in as to whether or not you get disconnected.

            This would explain why wireless Android Auto always disconnects, because it forces 5GHz. If we also assume that mdapa's university enterprise gear was 5GHz and their old phone hotspot was 2.4GHz then that's also explained.

            MAC settings also made no difference to whether I was disconnected or not, the frequency band was the only thing that changed the outcome.

            I hope the GrapheneOS Team can have a look at this

            Gilboboy I just checked and this is the case. My uni's wifi is 5GHz and my mobile hotspot is 2.4GHz.

              Gilboboy I've submitted an issue here: https://github.com/GrapheneOS/os-issue-tracker/issues/3944

              That seems likely to be upstream.

              Please feel free to subscribe to the issue or use a reaction (e.g., thumbs-up), but for previous GitHub issues the developers have firmly requested that people not make "me too!" postings -- in the past that has resulted in the developers just locking comments on an issue.

                Good suggestion.

                For anybody that it's helpful for, I've found that it's specific 5GHz channels that are affected. If you are able to change the 5GHz channels your access point uses, you can find one that doesn't disconnect for you (my Android Auto wireless hasn't disconnected when using Channel 165).

                  Gilboboy For anybody that it's helpful for, I've found that it's specific 5GHz channels that are affected.

                  This is great information for people to have. Thanks for reporting it!

                    Gilboboy where can you Change that? If Iam connected to Android Auto Iam Not able to change anything with the WLAN Iam connected to

                      Gilboboy
                      If thats an actual issue, then that to me would suggest a limitation of the wifi chip in the some of the Pixel devices..? I havent had any disconnection issue at home, but my access point is set to chanel 36, 80mhz channel width & 802.11a/n/ac mixed.

                        Were all these Pixels purchased through different vendors or through 1 vendor?

                        Could thr phones have bren tampered with prior to arrival because they want cell service used?

                          Ive had the same problem on my Pixel. My solution so far has been to change my Routers (Fritzbox) 5Ghz connecting channel to 140. Connecting to the lower channels 38, 40, 44 and so on has caused frequent drops with no reconnect. I havent tried all channels yet, but fyi im the only one using this channel in my wifi range. Also using "per-network randomized MAC". Dont know whats causing the problem, but this has been working for 1 week now without issues. Hope this helps someone.

                            user411 Thanks for the report! I added it to issue 3944. I don't think we need to get a complete list of working/not-working channels, but it would be interesting to hear if anybody using 5 Ghz channels above 140 does get disconnects or if anybody using 5 GHz channels under 50 does not have disconnects.

                            Overall I suspect the thing to do is to switch channels (or switch to 2.4 GHz) until Google fixes whatever they broke.