MinecraftIdentifier does not properly work
using the MinecraftIdentifier causes problems when connected to. no matter what you put for the version tag and server protocol it always says "Outdated Server"
The version tag, as far as I am aware, does not determine if the server is considered outdated or not when connecting to the game, that is only for display purposes on the main menu. Are you using JRakNet for the case of implementing Minecraft's protocol with RakNet, or are you assuming JRakNet is the Minecraft protocol?
First, check the RakNet protocol versions. At the moment, jraknet supports version 10, as well as all new MCBE. This change happened recently, and should fix your error
Tested, it has fixed.