Description of problem:

Sometimes running the Serverless UI in traffic distribution can't be used because 'Add revision' button isn't enabled. Serverless Operator UI tests reports an error:

AssertionError: Timed out retrying after 60000ms: expected '<button.pf-c-button.pf-m-link.pf-m-disabled.pf-m-inline>' not to be 'disabled'

The failure can be seen in this CI run

The UI test screenshot available in link

Latest failed job because of this can be seen at search.ci.openshift.org

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

Install serverless operator, install Serving.

Steps to Reproduce

1. Run serverless-operator UI tests a couple of times (clone operator repo, run `make test-ui-e2e`)

Actual results:

Sometimes, the 'Add revision' button stays disabled for some reason.

Expected results:

The 'Add revision' button should become enabled before 60sec had elapsed.

Reproducibility (Always/Intermittent/Only Once):

Intermittent

Build info

Seen it in OCP 4.6, quite possible it can also be present in newer releases as well.