ScopedState can not be re-entered (regression caused by Batched DoFn worker changes) #21663
Description
We've observed some regressions in internal pipelines. We've narrowed the root cause down to #17384 - the worker changes for Batched DoFns.
I still don't understand the root cause, but given this change can lead to a regression in pipelines that don't use the feature I think we should roll it back.
Imported from Jira BEAM-14481. Original Jira may contain additional context.
Reported by: bhulette.