Collapse to zero-width glyph behavior changed in Glyphs 3

Glyphs
1

In the discussion Custom LSB & RSB for Zero Width Mark Attachment I learned that marks are automatically reduced to a zero-width where the right edge becomes the center of the zero-width glyph.

This behavior has changed in Glyphs 3; now the glyph is collapsed onto the left edge.

The new behavior:

export
export2562×2426 235 KB

Here is the test-font I used for the screenshots: Test.glyphs (6.8 KB)

If this new behavior is intentional I can change my glyphs.

2

As far as I know, it is an intentional change.

3

Too many people had complained about the right shifting.