Using both RTHandle and Dynamic Resolution outputs ArgumentNullException, eventually causing a crash

When Dynamic Resolution is enabled in a scene where RTHandle is used, ArgumentNullException is output and app crashes after a while.

Repro steps:

1. Open the attached repro project.
2. Switch to an affected platform.
3. Check Develpment Build and Build and Run.
4. Change the dropdown at top left to Dynamic Res.
5. Observe that the exception is printed.
6. Leave the app until it crashes (took ~40mins on my environment).