Docs navigation sidebar is not expanding items 5 levels deep

Problem

When trying to view docs navigation items 5 levels deep, the navigation section sometimes fails to expand. Selecting the section seemingly responds, and there's browser activity, but the section is not expanded.

Further details

Tested on Google Chrome on macOS (Version 103.0.5060.134 (Official Build) (x86_64)).

Steps to recreate

1. Go to https://docs.gitlab.com/charts/charts/.
2. Select Advanced.
3. Check if the “Advanced” section expands. If it does, select another section above it, then select the “Advanced” section again.

A page refresh should allow you to expand (and collapse) the section. But… if you select another section above it, perhaps “GitLab sub-charts”, you should again find that the “Advanced” section does not expand when selected.

Note: It seems that the expansion of docs sections works for up to and including 4 levels, and that the problem only occurs for pages at level 5.