Title: Need to permit the combination 011711 011722 011721 01172B

Font: Noto Serif Ahom

NOTOSERIFAHOM-REGULAR.ttf

Font Version

Version 2.006 ttfautohint (v 1.8.4.7-5d5b)

Issue

Within the Tai Ahom script, there is a particular combination of the symbols 011711 011722 011721 01172B that conveys a word pronounced something like /hit/ and meaning 'do'. At present this is realised with dotted circles. as

My understanding is that this is caused because the vowel symbol 011721 is not permitted to combine with 01172B but this should be made possible