Drafts can be finished and sent under another agent's name
An agent can edit the draft of another agent and send it out under the original agent's name.
Upgrade to the latest available OTRS patch level (https://ftp.otrs.org/pub/otrs/).
As a workaround, you can replace the affected files (see below for download).
ATTENTION: Please check if any of these files have been changed in your OTRS installation by additional add-ons. In that case you MUST NOT simply overwrite the files with the ones provided below. Please contact us instead.