In the past I've been able to use --user-data-dir=${HOME}/attempt1 , 2, 3, etc. to get a Chrome instance with the field trial disabled where a bug didn't repro.
Missing: cs= 3Drsakeyusageforlocalanchors%
Duration: 0:38
Posted: Oct 1, 2023
Posted: Oct 1, 2023
Missing: chrome fieldtrials% 3Drsakeyusageforlocalanchors%
Duration: 13:32
Posted: Mar 22, 2023
Posted: Mar 22, 2023
Missing: chrome force- fieldtrials% 3Drsakeyusageforlocalanchors% 2Fdisabledlaunch