PR stuck in merge pool when one test is still failing

[Bobgy]

What happened:
kubeflow/pipelines#2559 has tide status: in merge pool.
Even though one test is failing.
However, prow bot doesn't merge it, so it's stuck in this status and also blocks future PRs from being merged automatically.

What you expected to happen:
Prow bot should move it out of merge pool.

How to reproduce it (as minimally and precisely as possible):
I don't know, take a look at the PR's history. I think something subtle happened.

Please provide links to example occurrences, if any:

Anything else we need to know?:

[Bobgy]

After more commits added to the PR, it is pulled out of merge pool correctly.

[Bobgy]

This seems to be caused by kubeflow/pipelines#1653.
Solve the problem there
/close

[k8s-ci-robot]

@Bobgy: Closing this issue.

In response to this:

This seems to be caused by kubeflow/pipelines#1653.
Solve the problem there
/close

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