This may be a O365 issue, but as of today when working on Nintex Workflow O365 I can not terminate a workflow manually. I click the option and it just runs. Try to kill it in the Workflow Health and it doesn't effect it. Even tried to use another workflow to kill this one, and it doesn't budge. It's been like this all day and on all my site collections. Works great all week.

Is anyone getting this or seen it before?

Is it a O365 issue or a Nintex issue?

RESOLUTION UPDATE Nintex informed me they have no control other than building the workflow. The workflows in Nintex use the Workflow Manager in Office365 and performance issues can be triggered by other tenants in your shared farm or farm issues. They recommend putting in a ticket to get it resolved. My issue lasted the whole weekend and never got to putting in a ticket.