There was something wrote about some china IPS blocks 4444,44444 port connetions.
So port 4444,44444 nodes you may cant use.
With first update I recommend dev may change port, so more secured/monitored clients can join in too.
Are you all in China?
It is not helpfull, as I wrote before, we tried all kind of ports:
addnode=84.251.34.142:3232
addnode=145.220.255.56:35937
addnode=24.155.217.218:62494
addnode=183.171.178.11:10278