Minimising the menu sidebar doesn't update the code editor

This is a minor issue but when editing a page, if you toggle the visibility of the right hand toolbox it causes the content of the code editor panel to reflow - i.e. with more viewport real estate available the lines wrap to the longer width.
However doing so with the main menu sidebar doesn't cause the same update. The code editor wrapping stays the same even though the code editor itself changes size, this means you either have a blank space on the right hand side of the code editor or your long lines of code wrapping are half hidden out of view. Manually resizing the page then causes the expected reflow.
Tested in Chrome Version 83.0.4103.97 on macOS Cataline version 10.15.5 (19F101)