[1.20.1] Transparent blocks change opacity depending on angle they are looked at

[Daktyl198]

Transparent blocks (water, colored glass, etc) have a weird glitch where they sometimes start flickering between different opacity levels depending on the angle you view them at.

Here are two example image:

[FiniteReality]

Do you have a modlist, per chance? It almost looks like the water is being rendered twice or something, and I'm not entirely sure why that would be right off the bat.

[FiniteReality]

Additionally, could you try turning off the waypoint markers you have in your map mod? I don't think it's causing it, but it would be nice to confirm, as it's the only thing I can immediately notice being different between the screenshots.