Well it turned out to be even stranger than I knew. Here is the setup.
100 ft of Cat6 from the power supply to the Powerbox. Connected to the powerbox is an LHG 2 XL and an SXTG-2HnD. Attached to the POE injector 100 ft away from the powerbox is a google nest router. As far as I can tell, this setup should work. And plugging in everything except the SXT everything works as advertised. And it works well. But as soon as I plug in the SXT, the LHG and SXT shart cycling. I get into the powerbox, and it shows that both radios are shorted. If I turn the POE setting for the SXT off, the LHG works fine, and the other way around as well. Now here is where it gets strange. I have a 22400 mah battery I use to power a MaP for aiming CPE's and other things. I connected this battery, just the battery, to the powerbox and everything works great.
Is there some sort of restrictions on the POE in that I am missing?