beam_PostCommit_Py_VR_Dataflow(_V2) failing metrics tests

beam_PostCommit_Py_VR_Dataflow and beam_PostCommit_Py_VR_Dataflow_V2 are failing some metrics tests. e.g.

"""

apache_beam.metrics.metric_test.MetricsTest.test_user_counter_using_pardo

IndexError: list index out of range

"""

The most recent change to metric_test.py was in https://github.com/apache/beam/pull/14788, could that have caused it? cc udim

https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/7944/

https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow_V2/2032/