When i copy a DSP chain and paste it on another track Renoise automatically resets the track’s pre and post mixer. However, if you append it, it does not, which is the expected behaviour.
If i copy a DSP chain onto a track i don’t want it to touch the mixer at all, but if it should, i think it would be a lot better if the mixer settings also were copied along with the DSP chain so that when you paste the DSP chain it will become identical to the one you copied. Now it just resets the mixers instead.