Scribunto error messages in English Wiktionary have a popup that appears when you click them. The popup contains more information on the error. Sometimes this involves a traceback.
When the traceback mentions a line in a Lua module on the wiki, it links to the module, with a link fragment containing the line number; for instance, currently in [this edit](https://en.wiktionary.org/wiki/Special:Permalink/54825976), `#mw-ce-l174` where 174 is the line of the module mentioned in that line of the traceback. If you click the link in the traceback, which takes you to the module, the fragment has no effect. This seems to happen whether or not CodeEditor is enabled.
Formerly, when you got to the module page, the textbox would be focused and the cursor would be placed at the beginning of the line mentioned in the link fragment. This was very helpful because you would be able to see the line mentioned without having to scroll down in the textbox or use the "jump to line" feature.
I don't recall exactly when this changed, but a year or more ago.
Reproduction: go to [this edit](https://en.wiktionary.org/wiki/Special:Permalink/54825976), click the red Lua error to open a backtrace, then click the line of the backtrace that mentions a line of [Module:debug](https://en.wiktionary.org/wiki/Module:debug) (at the moment of writing, line 174). This should open Module:debug and scroll the page to the code editor and show that line in the code editor, but at the moment no scrolling of the page or the code editor happens.