Is your feature request related to a problem? Please describe.
A situation where we attempt to start a child workflow from a workflow scope that is already cancelled is not covered with unit tests.

See
https://coveralls.io/builds/57953701/source?filename=temporal-sdk%2Fsrc%2Fmain%2Fjava%2Fio%2Ftemporal%2Finternal%2Fsync%2FSyncWorkflowContext.java#L586