Keep testing it and retesting it to see if you can isolate the variables that cause it, and then you'll be able to Google it from there or take it to Image Line's support team. I've never had this happen anywhere else and the only thing to say about it is 'well, these things just don't like each other.' Sometimes I get a complete video after restarting, sometimes I just get a giant.

This laptop I'm on right now has a weird problem where if I'm cutting videos with Windows Movie Maker, if there's a video with a certain codec in it (and I haven't been able to determine which one), even if it allows me to import it in, cut it and start saving it, it will completely restart the computer RIGHT as it finishes. Sometimes programs, operating systems, computer components and so on come into a weird conflict and just don't work. The option for the latter is just to restart FL Studio and try again, the former requires isolating that it's the VST or something more pinpoint (samples chosen, some option flipped on, etc.) to see what's causing it. It's either been a conflict with the VST itself (just something in the program, computer and VST all combined together causes it) or FL Studio being buggy. FL Studio is very flexible in the way you can work with it when mixing.I don't have the version you have, but I've had FL Studio do this or something similar to this to me a few times in the past. With its channels and mixer insert tracks, you can build up quite complex mixes. Let's look at some tips and tricks on how to get the most out of FL Studio when you mix your tracks. Tip 1 - Route Your Channels to Dedicated Mixer Insert Tracks With FL Studio you can route any channel to any insert track in the mixer. This is nice in that you can customize your channel layout in the mixer by determining which channels go to which track. With each channel going to a dedicated mixer insert track, you can apply individual effects to each track. To see what track a channel is routed to, first select the track by clicking on it in the Step Sequencer window. This will open up the Channel Settings window for that track and in the top right-hand corner you'll see a box labeled FX.

This shows which insert track the channel is routed to. You can change the routing by dragging up or down. Notice how the track selection of that channel changes in the Mixer window. Now select another track, and then go back to the Send reverb track.

Fl studio copy effects mixer