OK, HELP, I give in—I need an on demand request option!

[DJ Elevate]

Thanks, I've never noticed. However it may cause glitches if there's audio playing, I too have purchased tracks during gigs and only added them manually.

Yes - I will say that once it did cause Traktor to crash forcing me to restart the application.

[MusicMix]

This has been happening with me a lot recently also. I have started just hooking up a second laptop and listening to the song and then downloading it on the second laptop and play it from there. If the venue does not have WiFi, I just use my phone's connection. This way it does not affect my main laptop. This has been working good for me.