Debugging instability introduced by #317 (#323) #19

Job	Run time
diagnostic_aggregator on humble	4m 8s
diagnostic_aggregator on iron	4m 19s
diagnostic_aggregator on rolling	4m 23s
diagnostic_common_diagnostics on humble	4m 6s
diagnostic_common_diagnostics on iron	3m 16s
diagnostic_common_diagnostics on rolling	4m 7s
diagnostic_updater on humble	3m 58s
diagnostic_updater on iron	3m 48s
diagnostic_updater on rolling	2m 52s
self_test on humble	4m 5s
self_test on iron	4m 54s
self_test on rolling	5m 4s
	49m 0s

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