The slides in SCS is hardware accelerated, combining this in with the different values that make up the height of the feedback container – which are mostly given in EMs – results in the text being blurry when the site font-size is less than 15px, or 16px, or 18px etc.
The solution to this is to ensure the container height is an even number – or – removing traslateY(-50%).
Example: 65px - 50% = 32.5px – i.e. blurry text
This is always seen when viewing the content in the WP dashboard.
No blurry feedback text when used in most themes.