Hey, really like your resource pack, as you mentioned in the changelog for 9.0 some mods can use your rounded texture and I found some which do so and it looks a bit odd. I mean the Croptopia Fruit Leaves, Immersive Weathering and Project Vibrant Journey Leave Piles. Hope you can get this fixed.
Here are the links to the mods with some screenshots:

https://www.curseforge.com/minecraft/mc-mods/croptopia
https://www.curseforge.com/minecraft/mc-mods/immersive-weathering-forge
https://www.curseforge.com/minecraft/mc-mods/project-vibrant-journeys

same happens with quark's leave carpets

the first screenshot is using betterleaves 8.0

I'll track Croptopia support in #13
Got all the leaf carpets working correctly in the in-dev 9.1 version :)