Safari password autofill fails when BlockBlock 2.4.2 is enabled on Apple silicon Mac both notarization & paste protection enabled

[simmerskool]

Mac model: Mac mini M4
macOS version: 26.4
BlockBlock version: 2.4.2
Features enabled: Notarization Mode enabled, Paste Protection enabled
Symptom: Safari would not autofill a saved username/password on a login page. Opening the Passwords app did not help. No BlockBlock popup appeared.
Test performed: Disabled BlockBlock, rebooted, reopened Safari, same URL autofilled normally without touching the Passwords app.
Expected result: Safari AutoFill should work normally while BlockBlock is enabled.
Actual result: AutoFill fails only when BlockBlock is enabled.