Malayalam rendering of ഴ്വ & വാഴ്വ് is not correct in the Lohit-Malayalam font
This is one of the test case listed here: https://raw.github.com/smc/fonts/master/tests/tests.txt
I used the TTF file available here: https://fedorahosted.org/releases/l/o/lohit/lohit-malayalam-ttf-2.92.0.tar.gz
I used harfbuzz 0.9.26
attachment
We will work on this issues on github. https://github.com/pravins/lohit/issues/48 closing here.