Syntax Highlighting and/or Autocompletion failed to load

This is still a problem on version 18.7.0 and I am seeing it on three different servers running on Ubnutu 22.04 and 24.04.

When I look at the JS console as I try to edit a page, the broken (404 not found) code mirror URLs all look like this:

https://example.com/xwiki/webjars/wiki%3Atools/codemirror/5.65.21-xwiki/mode/htmlmixed/htmlmixed.js 

Apparently a colon ':' isn't getting changed to a '/' and instead is getting encoded as '%3A' which breaks the URL.

I suspect that this is something in the source code and not something in my configuration, but please let me know if I am wrong so I can fix it.  It is only codemirror JS resources that are having this problem. Uninstalling and reinstalling the codemirror extension did not fix the problem for me.