The triton sends some controller resets when you press stop/play. These bring the virus to cease the sound. Standard controllers MFX1 send and MFX2 (somewhere around CC93-95) cause conflicts with the Triton sequencer. Check if you can disable these controllers in the Triton.
Another solution can be to set the Virus to receive only Sysex-Controller instead of CCs or to set the appropriate controllers in your song at starttime.
If you still have trouble, please report to
support@access-music.de
-tk