Feature 'blwf' for Indic Scripts is not yet supported

[kotpal]

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Indian languages use combining characters and OpenType is not rendering them properly.

Expected Behavior

For example, కృష్ణ is not rendered correctly by OpenTypeJS but notepad (for example), renders it correctly as:

Current Behavior

కృష్ణ is being rendered as following at https://opentype.js.org/index.html (using Google Telugu font - Noto Sans Telugu):

[Connum]

This combination uses the OpenType feature blwf ("Below-base forms"), which like many others is not yet supported. See For Indic scripts, this and several other features should be processed in a specific order: 'nukt', 'akhn', 'rphf', 'rkrf', 'pref', 'blwf', 'half', 'pstf', 'cjct'.