Source indent file during reloading

autoload/vimtex.vim

@@ -170,6 +170,12 @@ if !exists('s:reloading_script')
     let s:initialized = 0
     call vimtex#init()
 
+    " Reload indent file
+    if exists('b:did_vimtex_indent')
+      unlet b:did_indent
+      runtime indent/tex.vim
+    endif
+
     call vimtex#echo#formatted([
           \ 'vimtex: ', ['VimtexWarning', 'reloaded']])
 

indent/tex.vim

@@ -8,6 +8,7 @@ if exists('b:did_indent')
   finish
 endif
 let b:did_indent = 1
+let b:did_vimtex_indent = 1
 
 call vimtex#util#set_default('g:vimtex_indent_enabled', 1)
 if !g:vimtex_indent_enabled | finish | endif