Kerning Interpolation


I am having a problem with kerning interpolation.

Some kern pairs just interpolate well, but others badly. They seem very fine in the preview but after exporting some pairs get messed up.

Take a look at this screenshot from indesign (I verified and the otf has in fact the wrong kern pairs)
(The extremes are the masters)

Do you have classes and all the small locks closed (from both sides)?

There was an unlocked kern pair

It might be helpful if Glyphs had feature (or just a script) that automatically compares kerning across masters and reports anything that will not interpolate correctly.

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