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When it comes to hyphenation while my case-feature is active (and positioning some glphys a 100 units higher) a missing glyph right after the hyphen occures. “.notdef” is displayed. This only happens when case-feature is active (positioning the hyphen).
My theory is that this may be because case feature is described in the spec as GSUB features, not GPOS. Can anyone confirm or discard this? Sadly I couldn't find the OT specs for this on my own.
If not: What is the reason for this missing glyph? How to fix this?
I really hope someone can help me with this problem.
PS: This does not happen if I insert a hyphen manually.