Regression between NPM releases 0.0.16 and 0.0.17 - Phoenix support no longer working

[nikfp]

What version of VS Code are you using?

Neovim 0.11 with the language server installed through Mason

What version of Tailwind CSS IntelliSense are you using?

Tested with v0.0.16 through 0.0.18

What version of Tailwind CSS are you using?

Multiple for different projects

What package manager are you using?

npm and pnpm

What operating system are you using?

linux and macos

Tailwind config

Multiple configs

VS Code settings

N/A

Reproduction URL

Due to this being a combination of various tools, an MRP is not feasable

Describe your issue

The core expectation of intellisense and so on has continued to work correctly for all default languages I've tried, up through v0.0.18. However I have an extension point in my Neovim config that allowed use in Elixir files including Heex templates, and also has a classRegex setting to detect some special syntax that heex allows in classes.

I noticed recently that this was broken, and the only fix has been downgrading the LSP server to 0.0.16. The docs also no longer show the classRegex experimental setting, but since the README is a symlink it's not showing versions I can walk back on and see when that was taken out. I'm having trouble locating the regression.

Please advise on any other information you might need to pin this down. I'm glad to help where I can.