Suggestion

1. Setup [playground demo]
   • Have a line of code such as console.log("abcdefghijklmnop"); in code editor
   • Enable an AST viewer
   • Shrink your browser width so that the AST viewer needs to horizontally scroll to see everything
2. Click within the code
3. Click to the right of the code

The code editor will be scrolled horizontally, with no way to take it back:

cc @jimsu2012, re #5667 - not sure if caused by that one, but seems at least related & in the same code area.