I upgraded my PC Client to use 1.12.2, however trying to connect to my severs on 1.12.1 fails because of the versions. My understanding from the website was 1.12.2 was a bug fix only release and that there were no new protocols added. That to me sounds like the client should be able to still talk to the 1.12.1 server. I would like to know why the two versions aren't supporting at least 1.12.1.
Reported to Mojang and they said their client can connect to 1.12.1 which I was able to confirm using a connection to a 1.12.1 world from 1.12.2 client. This appears to be BungeeCord specific. Thanks! Steve