Some combinations of AM+I vowel signs munge together after a dotted circle

[r12a]

Font

Noto Serif Ahom

Where the font came from, and when

https://notofonts.github.io/

Font Version

2.007

OS name and version

macOS Sonoma 14.7

Application name and version

Web-based picker (in devt) https://r12a.github.io/pickers/ahom-aho/index.html?text=%F0%91%9C%92%F0%91%9C%A2%F0%91%9C%AA%0A%E2%97%8C%F0%91%9C%A2%F0%91%9C%AA

Issue

The combinations of vowel signs look ok after A, but collapse together after a dotted circle.

Character data

See the picker link. Select characters and click on List Characters to see code points.

𑜒 U+11712 AHOM LETTER A
𑜢 U+11722 AHOM VOWEL SIGN I​
𑜪 U+1172A AHOM VOWEL SIGN AM​

◌ U+25CC DOTTED CIRCLE
𑜢 U+11722 AHOM VOWEL SIGN I​
𑜪 U+1172A AHOM VOWEL SIGN AM​

Screenshot

Other combinations of vowel signs with dotted circle seem to work as expected, so far. If i come across other examples i'll add them below.

[r12a]

Same problem with

𑜒 U+11712 AHOM LETTER A
𑜧 U+11727 AHOM VOWEL SIGN AW​
𑜪 U+1172A AHOM VOWEL SIGN AM​
◌ U+25CC DOTTED CIRCLE
𑜧 U+11727 AHOM VOWEL SIGN AW​
𑜪 U+1172A AHOM VOWEL SIGN AM​

https://r12a.github.io/pickers/ahom-aho/index.html?text=%F0%91%9C%92%F0%91%9C%A7%F0%91%9C%AA%0A%E2%97%8C%F0%91%9C%A7%F0%91%9C%AA

[r12a]

I just corrected the code point order in the examples. This threw up another issue that i'll raise separately.