This may be related to https://gatkforums.broadinstitute.org/firecloud/discussion/10854/bug-loading-multiple-set-entities-via-the-importentities-api-returns-a-502-error-code
but unlike that issue, the submission doesn't go through. I've tried to submit jobs multiple times (waiting for 30s between attempts), but no luck.
When can we expect a fix for these 502 errors? This is a fairly blocking issue...