Interesting! . The fact that it eventually worked after glueing, does indeed suggest that there is a problem with Lanes.
EDIT: I just tried a mockup of your recipe, and I can confirm your findings.(also, same buggy result if you used a combination of several tracks, rather than Lanes on the same track) Certainly seems like a bug to me! (I’ll edit an extra line in the recipe above… thanks ).
. The fact that it eventually worked after glueing, does indeed suggest that there is a problem with Lanes.
).