https://stash.reaper.fm/37133/AI.gif
On track 1,2 I have Lethal and Avenger vsti plugins. Track 3,4 is empty. Please check the gif. When I select track1,2 Reaper is freezing. But when I select track 3,4 everthing is normal. (drivenbymoss is active and I'm using that dll file you sent a few messages ago.)