OnAudioFilterRead not working as expected for generator scripts

Steps to reproduce

1. Open the project contained in the attached archive oafr-tests.zip
2. Open the scene oafr-test
3. Enter play mode

Expected results

• A tone with random pitch fluctuations is heard
• A warning is logged:

Actual results

• A tone with constant pitch is heard
• No warning is logged

Reproducible with
2023.2.0b4, 2023.3.0a19

Not reproducible with
2022.3.15f1

Reproducible on
macOS

Not reproducible on
No other environment tested