Infesting a tree with a worm instantly turns the leaf invisible, and the subsequent infested leaves also turn invisible. You can still break them just fine.

I'm on AMD, but my friend with NVIDIA had the same issue. Shaders tested:

• SEUS PTGI HRR 3
• Sildur's Vibrant
• Complementary Reimagined
• BSL
• AstraLex

I'll look into that when I have enough time. In the meantime, Ex Deorum has a config option you can use called something like "fast leaves." if you turn that on, the leaves will become visible again.

Also what Shaders mod are you using?

Oculus!

I can't tell if this is a bug on Iris's end or mine, but for the meantime I'll just keep suggesting that players using shaders set use_fast_infested_leaves to true.

Although I couldn't get the regular leaves to work with Iris shaders, I was able to make Ex Deorum automatically apply the temporary fix (switching to use_fast_infested_leaves) for the user when shaders are enabled.