I have problems with the last update too. How did you rollback? i dont have to option in the phone menu..v3.0.After using few more days.I have encountered connection failure several time. so I have rollbacked to 2021-03-06 now.
My personal impression for 2021-07-05 FW on MX-5,
- Good case : It seems connection is faster than 2021-03-06
- Bad case : My guessing for Carlinkit sequence is ... Power ON->Bluetooth connection->Wifi connection. However for 2021-07-05. After power on , Bluetooth connection seems no problem. but No Wifi signal broadcasting. So connection menu is shown, but it wasn't connected. Once it is happened. I have never recovered again even though I plug off for Carlinkit. It was required power off (Engine stop) for MX-5.
- Bad case was happened 40%. It was no problem at first connection by each day. then once power off (Engine stop) then re-connection again, This bad case was happened 40%. (My rough calculation)
So I think 2021-03-06 FW is best for my MX-5.