I'm having an issue with intervals ramping up at sunset. I have set an interval of 25sec, for 600 shots. Right at sunset the intervals increase (up to 5sec. Intervals) and then stabilize back to 25sec after about 60 frames (or 10 minutes).. Any Ideas?
Nikon D810, TPLink 3040v2, and Nexus 7 tablet. Intervals triggered by Kessler Second Shooter +.

If you don't use the intervalometer in qDDB, your intervals will only depend on the device that are triggering them.
In that case, your question has nothing to do with qDDB or LRTimelapse. I'm sorry, but I'm afraid, I cannot help you with your problem, since I don't know the kessler hardware. But in any case, that behavior sounds strange to me.