[LAD] qtractor: Some instability with audio result from delay effect

Hello. It is my first attempt of serious (rather massive than advanced) DAW usage - i used it in montage of own "playlist" from some favorite tracks, which is not to be published anywhere at all, just for personal fun. One track is very long, while in one place i needed only some specific parts, which i joined not very precise. And just for fine tuning of that i used one delay effect, whose name i don't recall - can only say, that it is dublicated with different max ranges, from which i used least available (0,01 s). And there is problem: resulting hearable delay randomly changes in some small range near of one phase. Did not research this problem better - just eliminated that fading.