When a consonant bears both U+0EBA LAO SIGN PALI VIRAMA (acting as a nukta) and a vowel above, is there or is there intended to be any constraint on there relative order? While U+0EBA has canonical combining class 9, the vowels above have canonical combining class 0, so the order makes a difference.
Typographically, these marks don't interfere, but renderers may consider that to be a problem. The example of nukta and vowel below has now gone up on Wiktionary at https://en.wiktionary.org/wiki/ວິຍ຺ຍ຺ູ . The rendering worry arises with the other form of the instrumental plural masculine. MS Edge is currently giving me dotted circles for the sequences <U+0EBA, U+0EB8 LAO VOWEL SIGN U> and <U+0EBA, U+0EB9 LAO VOWEL SIGN UU>. I trust this is just a temporary aberration. Richard.
