BX-P-Ecomex Communications Issues

[BTimpson]

Hello
I am of need some assistance with issues I am having with 2 BRX PLCs communicating using BX-P-Ecomex Modules.
The first PLC is a Bx-DM1E-18ED-D with the On Board IP Address 192.168.1.70 Subnet Mask 255.255.255.0 and the POM module IP address set to 10.10.10.1 Subnet Mask 255.255.255.0
The second PLC is a Bx-DM1E-18AR3 with the On Board IP Address 192.168.1.200 Subnet Mask 255.255.255.0 and the POM Module IP set to 10.10.10.2 and a Subnet Mask 255.255.255.0
I am using an RX (Do-More Network Read) from the first PLC to acquire the desired Elements from the second PLC.
The RX is set to target the 10.10.10.2 IP address and the interval is set to 10 seconds. I have adjusted the ACK Timout up to 1000 ms with no result change.
The problem i am having is it only acquires the information a few times an hour inconsistently.
All cabling has been confirmed good.
I have not wire sharked it yet.
I have pinged both POM Module IP addresses with the same result of 4 sent an only one success and 3 failed.
Any assistance would be greatly appreciated