That is precisely what does not work for me.
With this option enable and set for 10 seconds, I get zero crossfade. None. Not in any situation.
If the 'crossfade when skipping tracks' is enabled I hear the crossfade when (and only when) I advance tracks, i.e. click the right arrow / next track button. If I manually switch to a different track, i.e. double-click any other track/album, I get no crossfade. I really would like to hear crossfade always.