Using variaudio on a clip and then using DOP results in same issue, until you do it a few times then it works again.
Something is wrong with order the temp-files are processed is my guess.
take an audio part and move a few notes around in Variaudio.
DOP reverse or Fade In/Out, to have something visual.
Variaudio analyses the audio again, as it was changed by the DOP.
Thanks Peakae and Martin for your replies, I did not trashed my preferences. However the problem happens now and since the last 24 hours. Sometimes it works at first try, sometimes I have to apply the effect again … That might be an issue from newer projects then, bc with older projects it seems to work (*well…not all the time) …