Let's Control It

Good afternoon,
i have the following effect:
3 esp8266
one running FW 147
2 running mega-20180804
1 running mega-20180808

all with UDP Port 65500 activated.
Every device ony have the 147 node in the node list. All others are not on the node list.
any suggetsons?

have you tried to reboot the nodes after activating the UDP sync?

What value you have in the "Unit Number"?
I jad same problem and then realized only units 1-32 are shown in the Node List