if uglyurls = true , the $active is not as expected

[anbang]

set uglyurls = true in /config/_default/config.toml
file : /themes/zzodoc/layouts/partials/main/sections/list-menu.html
code :

  {{ $root := .root }}
  {{ $ctx := .ctx }}
  {{ $depth := .depth }}
  <!-- Before: http://localhost:1313/zdoc/gettingstarted/quickstart/ -->
  <!-- Now   : http://localhost:1313/zdoc/gettingstarted/quickstart.html -->
  {{ $currentURL := $root.Permalink }}
  {{ $sectionName1 := index (last 1 (split (delimit (split $ctx.Permalink "/") "," "") ",")) 0 }}
  {{ $sectionName2 := index (last 2 (split (delimit (split $currentURL "/") "," "") ",")) 0 }}
  <!-- $active -->
  {{ $active := in $currentURL $ctx.Permalink }}
  {{ $active = or $active (eq $sectionName1 $sectionName2) }}
  {{ $active = or $active (in $currentURL $sectionName1) }}

EDIT THIS PAGE also has this problem. Can you help? thanks.