`animated_ui` example is broken

[rparrett]

Bevy version

main, bisected to #17567

Relevant system information

SystemInfo { os: "macOS 15.3 Sequoia", kernel: "24.3.0", cpu: "Apple M4 Max", core_count: "16", memory: "64.0 GiB" }
AdapterInfo { name: "Apple M4 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }

Also failing on linux/mac in the example runner.

What you did

cargo run --example animated_ui

What went wrong

Nothing shows up, just the clear color. There should be some animated text.

[ickshonpe]

There are missing glyphs in the button example when you first hover over the button, only the r is visible from Pressed.
Assume it's the same bug.

[rparrett]

The example runner also showed virtual_time missing some glyphs, but I can't reproduce either thing locally to confirm that it's definitely related.

[ickshonpe]

Isolated the button example problem to cold specialization too.