1. try scan button.
2. make sure you connect to a normal wifi network. (not GUEST wifi network. those enabled AP isolation, you can only see youself and gateway)
I can’t reproduce this . did over 20 times test run. 2-3 time it showed lower speed, however those due to other device also spiked on network usage. when network calm test with AIPS running, good result , test PC can run full bandwidth speed at the ISP provided .
Can you try do a few more test during normal run? also, if you are not using latest version, aips may keep restart netcut_windows.exe. make sure you have fresh latest version and see if it helps.