Go to usages only works if no subclasses defined

[EranNL]

Verified on latest main

• I have confirmed this bug still occurs when built from the latest main branch.

PHPantom version / commit

phpantom_lsp 7d7bbf7

Installation method

Built from source

Operating system

macOS aarch64 (Apple Silicon)

Editor

PHPStorm

Bug description

The following example:

I want to be able to see where this class is used. When I put my marker on the class and type Command + B (go to definition), the editor navigates to where `ServiceEntityRepository` lives.

When I remove all subclasses, the editor works as expected:

This is the case for both Zed and Phpstorm (at least, these are the ones I tested), at first I thought it had something to do with the LSP server plugin I am using in PHPstorm (LSP4IJ), but Zed has exactly the same problem when using PHPantom as described in the docs:

Schermopname.2026-08-24.om.22.35.28.mov

Disabling phpantom makes the editors behave as expected (check usage and declaration of the class, extended class or implemented class).

Steps to reproduce

1. Have a class extends another class.
2. Try to check where the sub class is used.

Error output or panic trace

.phpantom.toml

#:schema https://github.com/PHPantom-dev/phpantom_lsp/raw/main/config-schema.json

# PHPantom configuration: only add settings you want to override.
# Editors with TOML schema support (Zed, VS Code + Even Better TOML, Neovim)
# provide autocomplete and hover documentation for all available options.
# Full reference: https://phpantom-dev.github.io/phpantom_lsp/configuration/

[diagnostics]
workspace = true

Additional context

No response