Note: after I wrote all this I realized that it seems to be a problem on Firefox and not chrome (Win11). But I figured I would still post it since you might not be aware.
It just caught my eye that the current default font is doing substitutions for Pali letters
aā uū tṭ dḍ nṇ nṅ mṁ lḷ
Here is a screenshot of what I see for the above text:
The substitution is most obvious on the t/ṭ.
To be clear: this is a very minor problem that you may just want to ignore. But if you were already going to be messing around with fonts you might look into it.
It appears that the problem has to do with Open Sans.
I’ve never actually used the Fonts tab in devtools, but I do see this on a different post:
