I have two NC450 2.0 installed next to each other and pointing on different locations outside the house, the problem is that when it starts to get dark, even though there are lights around, the frame rate drops to from 30 FPS to 7 FPS on both cameras without using the night vision which is not needed.

I'm viewing both cameras locally on the TP Link Camera Control software on Windows 8.1 (32-bit), both cameras are set to 30 FPS and the backlight compensation are disabled, and they are connected to a close by router wirelessly on the same channel, signal strength is 80% ish for both

Both devices are on 1.3.4 Firmware


Is it normal that the frame rate drops when it gets dark? or am i missing something?