Tracking H4 Macro troubles

Our current festival setup is 2 H4's one FOH and one on stage and 2 DP's on stage, FOH H4 is 172.31.0.1 stage H4 is 172.31.0.10 both desks set to Net #1 and server running on both to allow tracking in case of problems with FOH H4.
Each page has our main list triggered by SMPTE brought in to the network via LTC widget connected to on stage DP.
In the comment macros for each page we have a "DOT" macro and then "ET1234" etc, when I run through pages with just FOH H4 connected to network time code is enabled just fine.

When the stage H4 is connected the comment macros on each page don't always run! For some pages we also have comment macros to raise/lower master intensities, these do not always fire as well due to the festival situation it is not easy to fault check.

Has anyone else experienced this issue?

B