I have been having problems with SubLab in FL especially on export. While I am working in FL, it seems to be working as intended, but when reviewing my project after export as a WAV file, when the 808 comes in, the entire thing just goes silent. No sound at all. When I go back into the project, the same thing happens. When the midi starts in a pattern or when I play a note with a midi keyboard, all my audio cuts out and I have to restart FL entirely. The only thing that prevents this is switching sounds within SubLab, but when I export, the same problem occurs.
What version are you on?