Flaky test test_janky_actions: Cannot read null.fingerprintslast

[github-actions]

Flaky tests were detected in this test run. This means that there was a failure that was cleared when the tests were simply restarted.
Failures:

test_janky_actions: [23:17:49] Runtime in code/game/objects/effects/effect_system/effects_smoke.dm,301: Cannot read null.fingerprintslast
proc name: set up (/datum/effect_system/smoke_spread/chem/set_up)
src: /datum/effect_system/smoke_spr... (/datum/effect_system/smoke_spread/chem)
call stack:
/datum/effect_system/smoke_spr... (/datum/effect_system/smoke_spread/chem): set up(/datum/reagents (/datum/reagents), 3, the floor (125,125,10) (/turf/open/floor/iron), 0, 1)
/datum/xenoartifact_trait/majo... (/datum/xenoartifact_trait/major/smoke/chem): make smoke()
/datum/xenoartifact_trait/majo... (/datum/xenoartifact_trait/major/smoke/chem): trigger(/datum/component/xenoartifact (/datum/component/xenoartifact), "major", null)
/datum/component/xenoartifact (/datum/component/xenoartifact):  SendSignal("COMSIG_XENOA_TRIGGER", /list (/list))
/datum/component/xenoartifact (/datum/component/xenoartifact): trigger(null)
/datum/xenoartifact_trait/acti... (/datum/xenoartifact_trait/activator/weighted): trigger artifact(John Doe (/mob/living/carbon/human/consistent), "XENOA_ACTIVATION_TOUCH", null)
/datum/xenoartifact_trait/acti... (/datum/xenoartifact_trait/activator/weighted): translation type d(the bluespace artifact (/obj/item/xenoartifact/objective), John Doe (/mob/living/carbon/human/consistent), 8192)
the bluespace artifact (/obj/item/xenoartifact/objective):  SendSignal("item_equip", /list (/list))
the bluespace artifact (/obj/item/xenoartifact/objective): equipped(John Doe (/mob/living/carbon/human/consistent), 8192, 0)
John Doe (/mob/living/carbon/human/consistent): put in hand(the bluespace artifact (/obj/item/xenoartifact/objective), 1, 0, 1)
John Doe (/mob/living/carbon/human/consistent): put in active hand(the bluespace artifact (/obj/item/xenoartifact/objective), 0, 1)
/datum/unit_test/test_janky_ac... (/datum/unit_test/test_janky_actions): Run()
RunUnitTest(/datum/unit_test/test_janky_ac... (/datum/unit_test/test_janky_actions), /list (/list))
RunUnitTests()
/datum/callback (/datum/callback): InvokeAsync() at code/game/objects/effects/effect_system/effects_smoke.dm:301