The vehicle is a 2017 Mazda CX-9 with EVO One previously installed. I added the RFK912 two way remotes and antenna, but only one remote programs successfully to the antenna. The second remote lights go solid blue-flashing blue five times-solid red briefly with a beep while holding the button. I have confirmed that the antenna LED is flashing blue in learn mode.
After programming attempts, the vehicle does not respond to the second remote but the first one works fine. The factory remotes start the vehicle with Lock-Lock-Lock, too.
I have already ensured that the EVO-One and antenna are flashed to the latest firmware.