How to reproduce

• go to the demo : https://demo.ametys.org/nightly-intranet-cms/_admin/index.html
• modify the comment Workflow on the intranet site "a priori"
  
• go to the back office
• enable comments on content
• go to the front office
• insert a comment
• A window appears confirming that the message has been sent
  
• However, users still see their message in the comment field and believe it hasn't been sent
  

So they click send multiple times.