rodrommel

I'm having a problem with beamed microwave power. I've sent a ship out to the moons of Jool. It has a tokamak running on D-H3 fusion, hooked up to a direct converter. It produces plenty of power to run the microwave transmitter on the ship. I have a separate lander that undocks from the large ship in orbit of whichever moon I'm landing on. It has an inline receiver and a thermal rocket nozzle using liquid fuel as a propellant. Once I activate the receiver, I'm able to see the 2.8 GW or so of power that I'm receiving in the power receiver interface. Once I activate the thermal nozzle, I start my deorbit maneuvers. Without fail, every time I get about 2.5km away from the mother ship that has the transmitter, the nozzle cuts off. The power receiver interface says I'm receiving the same amount of power. I've tried making burns of different deltaV's at different times to test different facing percentages. No matter what I do, at 2.5km the nozzle cuts off. I have lots of other mods installed, so I'm not sure if that could be an issue. Anyone else ever have this problem? Am I doing something wrong?