bug#53217: 27.2; background garbage display

[Eli Zaretskii]

> From: awrhygty@outlook.com
> Date: Thu, 13 Jan 2022 02:26:26 +0900
> 
> 
> Evaluate the form below, a blue rectangle garbage is displayed next to
> green space, under the cursor.
> 
> (let ((buf (generate-new-buffer "tmp")))
>   (switch-to-buffer buf)
>   (let* ((blue (propertize " " 'face '(:background "blue"))))
>     (insert blue))
>   (redisplay)
>   (delete-char -1)
>   (let ((green (propertize " " 'face '(:background "green" :height 0.5)
>                            'display '(raise 1))))
>     (insert green)))

Isn't this bug#25863?