Flickering textures on 2D planes

I’m trying to make a quasi-2D game by placing planes & adding textures on them. But I have this weird flickering along the edges of transparent materials. For example if I use a png of a character with a transparent background I’ll get flickering along the edges (sometimes from further I can see it in the image too).

Uploaded a video which (somewhat) demonstrates this: 2023 02 10 15 01 UnrealEditor 999 - YouTube

It’s pretty hard to notice but it’s just enough to be there, like the view is bugged.

I tried changing mipmap settings for the texture, tried FXAA and Temporal anti-aliasing, turned on/off virtual textures, looked for solutions online but nothing fixed this issue for me.

The flickering gets worse the less-accurate the “cutout” is around the character. So if I have a few white pixels left there (eg. using some magic wand background removal tool) it’ll flicker real bad, but even with good cutouts I can see it.