Weirdness: workflow seems to have reset in the middle of a run

Hi guys,

Something weird happened in my workflow that I've been asked to report to you under the umbrella of "making the product better" (I don't really care personally, but other users likely will).

It seems that in the middle of my workflow during one of the steps, the workflow just reset and started from the beginning again. In the workflow timing diagram you can see this very clearly. The step that was running at the time (SortSam at around 12pm) is just missing from the diagram and then the jobs all restarted from scratch and (mostly) call-cached. I eventually aborted the workflow so that's why it ends at the second invocation of SortSam (started around 6pm).

https://portal.firecloud.org/#workspaces/genentech-prod-genomes/genentech-wdl-testing/monitor/05a6672d-8938-4624-b68d-e9dfbaa1cb7b/3776083a-b971-4b97-90e7-6b7b3ad2ba0e

I'm going to be out for a while so have shared this workspace with @Geraldine_VdAuwera, giving her permissions to share with others.

Thanks