If I have multiplexed workflows, when a content is rejected in a multiplexed workflow, when I edit the draft to correct it, when publishing, I get an empty grey page with the text "Content publish cancelled"

It has been observed on 3.8.4, 3.8.6, 3.9.2 and 3.10.0

Steps to reproduce

• make a plain site installation of eZ
• log as admin
• create a user in the Editor user group
• add the "collaboration/access to all function" to the policies for the Editors
• create a workflow "test wf standard" with a single approve event whose approver is the created editor, and that will apply to the standard section.
• create a workflow "test wf media" with a single approve event whose approver is the created editor, and that will apply to the media section.
• create a workflow "test wf multiplexer" with 2 multiplexer event: the first is triggers "tst wf media" on the media section, the second triggers "test wf standard" for the standard section
• set your before publish trigger to "test wf multiplexer"
• create an article in the standard section and publish it
• run the workflow cronjob (optional)
• log as the editor to approve the article
• Deny the approbation
• run the workflow cronjob
• log as admin
• go to the "My account" tab and edit the draft of the rejected article
• publish it