Bad combinations of spacing Greek diacritics

[dscorbett]

Font

NotoSansMono-Regular.otf

Where the font came from, and when

Site: https://github.com/googlefonts/noto-fonts/blob/f4726a2ec36169abd02a6d8abe67c8ff0236f6d8/phaseIII_only/unhinted/otf/NotoSansMono/NotoSansMono-Regular.otf
Date: 2020-03-06

Font version

Version 2.003

Issue

When U+0306 COMBINING BREVE follows a spacing Greek combination of two diacritics, the base becomes non-spacing and the breve is placed below the base.

Character data

῍̆
U+1FCD GREEK PSILI AND VARIA
U+0306 COMBINING BREVE
῎̆
U+1FCE GREEK PSILI AND OXIA
U+0306 COMBINING BREVE
῝̆
U+1FDD GREEK DASIA AND VARIA
U+0306 COMBINING BREVE
῞̆
U+1FDE GREEK DASIA AND OXIA
U+0306 COMBINING BREVE

Screenshot

[nizarsq]

This issue still reproducible

[simoncozens]

This is related to (but not the same as) #21.