Web console request details Response tab - duplicate scrollbars

I’m not sure if this is just my problem, but whenever a line of text in Response payload is longer than DevTools window width, it is contained in a window with scrollbars (horizontal and vertical) which is in another window with scrollbars.

This looks OK:

But when I scroll right and down, another set of scrollbars appear:

To see the end of the text I have to scroll the outer window down to reveal inner scrollbar, scroll to the right with that and then scroll up again with the outer window.
Can anyone reproduce this?

Hello Robert.
We were able to reproduce this, and fix the issue (See https://bugzilla.mozilla.org/show_bug.cgi?id=1560804).
The fix will be in Firefox 69 (in Beta in a couple weeks)