Often if we can get a patch we can suggest a workaround if we find a problem and we can see what you are trying to do.
As it is with your description so far, I’m not able to see what it is you are talking about. Maybe some steps and and indication of the type of sound file you are using? Does groove~ interp make any difference? Do you get the same problem with wave~ or play~?
I’m not trying to be difficult, it’s just that we are actively working on things for the future of Max and I am very interested in the way people use groove~