For the most part, using GLOB Styles such as myperm.chat.(color|link) works well.
If a subject is granted myperm.chat.(color), LuckPerms does not validate that.

Where's the bug there?

Are you saying the myperm.chat.(color) entry should be expanded?

Here, I'll lay out my situation.
I'm using ProtectionPerms to block all interactions with the world. Instead of setting up the perms in the console, I'm making an import file with commands like this:
/lp group farmer-1 permission set protectionperms.item.use.minecraft:(wood|gold)en_hoe
This works fine! But let's say I don't want farmer-1 to be able to use golden hoes, so I edit the command to look like this:
/lp group farmer-1 permission set protectionperms.item.use.minecraft:(wood)en_hoe
and go about my business. When I import the file and try to use the wooden hoe, I am unable to do so. I believe the plugin sees the parentheses and starts matching, but since there is only one word, it doesn't behave properly.

Global styles are to combine 2 or more, not a single permission node that doesn't cover any other node.
/lp group farmer-1 permission set protectionperms.item.use.minecraft:(wood)en_hoe should be /lp group farmer-1 permission set protectionperms.item.use.minecraft:wooden_hoe

I kinda agree with @spannerman79 - but it's not a difficult change, so why not.