Description

In math mode, if I write _\delta or _{\delta}, the conceal will render as Unicode subscripts "elta", while \d seems to be treated as an macro and is hidden. As far as I know there is a Unicode character for subscript delta. Other greek letters seem fine (for the ones I use).

Steps to reproduce

Just write _\delta or put \delta in any part of a subscript enclosed by braces _{}, in math mode of course.

Expected behavior

Either concealed with a Unicode subscript delta, or at least render \delta as plain Unicode delta.

Actual behavior

It's rendered as subscript "elta" with "\d" part hidden

Do you use a latexmkrc file?

No

VimtexInfo

It should be a simple syntax file bug so VimtexInfo shouldn't matter here.