Builtin type not highlighted in isinstance

[failable]

Summary

Builtin type not highlighted in isinstance
Steps to reproduce:

Input the following content in a Python buffer

a: list[int] = []
if isinstance(a, list):
    pass

Expected Behavior:

Builtin type should be highlighted in isinstance.

Actual Behavior:

(list is not highlighted any more since updating to the latest preview.)

Zed Version and System Specs

Zed: v0.186.4 (Zed Preview)
OS: macOS 15.4.1
Memory: 64 GiB
Architecture: aarch64