Sinhala typing issue - නිර්මාණය
MacBook Pro (Retina, 13-inch,Early 2015), macOS High Sierra (10.13.6)
MacBook Pro (Retina, 13-inch,Early 2015), macOS High Sierra (10.13.6)
Word support for Indic scripts can be flakey. If the Apple fonts are the only ones that work right, those are what you have to use.
Only MS can fix problems with their apps:
Results in Office - Microsoft Community
When you post there, it is vital you tell them which version of Word you are talking about, it makes a big difference.
Looks like an issue with word for mac. Get in touch with the word developers.
.
Sinhala typing issue - නිර්මාණය