left: as I’d like it to work, just overlapping components
middel: Decomposed components showing white overlap as well
right: joined decomposed components. No white overlap.
Using Glyphs stable and beta as well.
revised nodes be counter-clockwise, and correct path direction.
EDIT: Also checked components were not flipped or rotated, and tried making the bottom-left node first.
Letterink’s outline path always starts at the lighter nib handle and follows the direction of the skeleton curve. There is some fine tuning for special cases but your glyph seems to be free of them.
For example, on the following drawing, the outline starts bottom right and follows the red arrows.
In case you would like to investigate the outline directions, you can ask Letterink to make outlines using one of the options in the following image and investigate the outlines. After you’re done with your investigation, you can use Glyph’s Edit - Undo menu action and reenable Stroke to On in Letterink.
PS: It might be wise to back up your glyphs file before making outlines so you can recover if something bad happen as the Make outlines is one-way by design (there is no way how to go from outlines back to a skeleton except the Edit - Undo).