The textures of leaves render incorrectly with the "Programmer Art" resource pack and the "See-Through Leaves" option enabled

I have attached three screenshots showing the issue. The screenshot from 1.21.10 looks what I consider to be normal, whereas starting with 1.21.11 the textures of leaves from Programmer Art begun to render differently, almost like their mipmap level has been lowered. At first I thought that the issue is caused by texture filtering so I tried disabling it, but that did not turn out to be the cause. I then assumed, due to the fact that 1.21.11 changed some things regarding the rendering of leaves, that non fully transparent/opaque pixels with weird values such as 1/255 or 254/255 were causing this. Unfortunately, even after manually adjusting the textures of leaves to only have opacity values of either 0 or 255 the issue persisted and nothing changed. Tweaking the leaves.png.mcmeta files did nothing as well. I have no idea what causes this and would really like to at least know how to fix this on my own, if possible.