Track down `ObjectDisposedExceptions` #2247

Job	Run time
call-build-test / build-win32	5m 49s
call-build-test / build-ubuntu	1m 28s
call-build-test / integration-ubuntu	4m 16s
call-build-test / sequential-integration-ubuntu	9m 21s
call-build-test / sequential-integration-win32	21m 3s
call-build-test / integration-win32	10m 20s
	52m 17s

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