I reckon the ips panels are just more sensitive to the pressure placed on them by the bezels.
People have had some success reducing backlight bleed by loosening screws to reduce the pressure on the panel.
Not that I'd recommend taking an expensive monitor apart![]()
The official explanation is:
https://us.answers.acer.com/app/answers/detail/a_id/48223/~/ips-bleeding-explainedWhat causes Backlight Bleeding?
IPS monitors consist of multiple layers that are meticulously superimposed at different angles. Slight deviations in the layering can cause pressure inside the display that can slightly displace the liquid crystals. As a result, more light can penetrate in some places than in others. The resulting light areas are what is referred to as backlight bleeding.
Acer is committed to high quality standards in the production of products, and develops technologies that minimize these impacts on users. Unfortunately at this time, it is not technically possible to exclude bleeding one hundred percent.
With this quality control by the manufacturers and still producing low resolution, expensive monitors, this mostly turns out to be money thrown to the wind.