Can you post debug.log then? (Use https://mclo.gs/ if possible) There might be more info around this line [13:08:54] [Netty Client IO #2/ERROR]: NetworkDispatcher exception ...
Ambassador seems to be erroring on some Transfers between Servers. This seems to be connected to the "new"/rewritten data reset/syncing code. v 1.4.3 together with velocity version 316 works but the 1 ...