Little bit more testing around this problem...
When im changing radio modes with Yaesu settings to following modes outcome for connection / no-connection u can see below
0 transparent, OK
1 ICOM CI-V OK
3 ft8x7, ft1000x OK
4 Yaesu, Kenwood, Elecraft OK
5 TS480/TM-d710 OK
11 2/4 wire transparent OK
2 IC706, not ok, 7 IC2500R / IC2725 not ok, 8 TS2000 no ok, 9 IC-e2820 no ok, 10 Yaesu Twin not ok, 12 to 16 also not ok
17 yaesu ftm350... connection LED is blinking on.... 3secs ON, 1 sec OFF
* i dont know how much yaesu settings will influence to these "not ok" results
** e.g. Yaesu power on/off parameter has been "no" mode all the time
i have also tried to change UDP cmd, UDP audio etc ports in following series 500x, 1300x and 1200x/1100x... although this shouldnt be issue on home local LAN.
J-P