How to setPostition without fade?

When I try to use the API EventInstance.setTimelinePosition, I found that it will fade out first as I set in AHDSR settings and fade in at the position that I set. How can I set the position without AHDSR?
Thanks a lot!

Any instruments which become triggered/untriggered due to the seek will start/stop and have the AHDSR modulators applied.

If you are just seeking inside an already playing instrument, we would not expect that the AHDSR would be applied.

Are you able to elaborate more on what you are experiencing and what you are expecting?