i crewed for them in late early 90s, got to watch the afternoon soundcheck, was better than the actual show (especially the lights 🌀🌀)
https://www.setlist.fm/setlist/tangerine-dream/1990/st-georges-hall-bradford-england-1bcdd5c8.html
there are previous topics about wave form display and zoom levels, one apparent workaround is to bounce the audio (which i guess forces a redraw)
/goodluck