Have you installed any two way drivers that are not set up. meaning they are not assigned specifically to a serial ip port. If you have a driver that defaults to a serial port for example like denon receiver drivers default to serial port 1, and then you plug something like a tuner into that port, you can get sporadic malfunctions, Further, Ip conflicts can cause K4's RK3's and Xp8's to behave badly.

You said- "in walls to 2 way control and connecting to network Via Ethernet port "

I  would recheck your IP settings especially the XP8 and then do a reset on the XP8 by pressing the button on the front panel