Default values are not available for Readiness probe fields

Description of problem:

For knative service, default values are not available for Health checks -Readiness probe fields

Prerequisites (if any, like setup, operators/versions):

Create Knative service with git url : https://github.com/sclorg/nodejs-ex.git

Steps to Reproduce

1. Navigate to Topology page
2. Right click on the knative service "nodejs-ex-git"
3. Select the "Edit Health Checks" from context menu
4. Click on the Readiness probe added link

Actual results:

Failure Threshold, Initial delay, Period, Timeout fields are empty

Expected results:

Failure Threshold, Initial delay, Period, Timeout fields should have default values

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.9.0-0.nightly-2021-08-30-232019

Additional info:

Liveness probe, able to see the default values