Audio Source “Reverb Zone Mix” field disappears from Inspector window and errors are spammed in the Console window when entering NaN value

Steps to reproduce:
1. Create new Unity project
2. In Hierarchy window create Empty GO
3. Add Audio Source Component to Empty GO
4. In “Reverb Zone Mix” field enter NaN value
5. Observe the “Reverb Zone Mix” field and Console window

Actual results:  Entering “NaN” value causes “Reverb Zone Mix” field to disappear from Inspector window, “Reverb Zone Mix curve has no keys!” Errors are spammed in the Console window
Expected results: “Reverb Zone Mix” field should not accept “NaN” value, no errors are thrown in the Console window

Reproducible with versions: 6000.0.73f1, 6000.3.14f1, 6000.4.4f1, 6000.5.b5, 6000.6.0a3

Tested on (OS): macOS Silicon Tahoe 26.4.1 (M1)