Gameplay Debugger interface goes offscreen

Created a new project from zero in UE 5.1.0, using the Third Person template. Upon hitting Play, and pressing apostrophe to bring up the Gameplay Debugger, its background appears stretched out horizontally beyond the bounds of the screen, hiding info on Debug Actor and VLog.

Here’s a picture of the problem (note the missing info on the top-right side of the screen):

Has this problem happened to anyone? How can I fix this?