This issue was opened on EMF I closed that and moved to here.
Describe the bug
textures.1=2
nbt.1.attributes.*.id=minecraft:max_health

above is the properties file, etf thinks that "id" is invalid list id

Expected behavior
Optifine doesnt do this and excepts my properties.

• Minecraft Version: [1.21.7]
• ETF version 6.2.14
• Tested also in:
• Minecraft 1.21.4
• ETF version 6.2.10

Example Pack

examplepack(1).zip

World file for easy debugging
Since it is really rare to get a zombie with max_health attribute here is the world file from screenshot.
dont bother about the texture being default zombie on the first screenshot.

Superflat.zip

hmm, i wasn't aware the wildcard symbol accepted further tags after it, i'll need to add support for this