auto subscript, fractions etc are not triggering #12
Description
A subset of the snippets don't trigger/work for me. While stuff like dm works without problems, most of the auto snippets like a1, a_12, (1+2)/3 don't trigger for me. I have tried a minimal setup of just using luasnip, vimtex and this plugin, but sadly no results. I have tried both autoexpansion and triggering expansion using tab. It seems to mostly affect the postfix snippets?