Wrong doctype html syntax included with content modification

Hello
I started a Xwiki 17.5.0 from the official docker image.
I initialize it with the recommended flavor of customization.

• I add the "Change request Application" extension.
• I create one page with my admin user, with 3 lines.

a
b
c

• Using an anonymous user, I just change the last line of the page and make a Change Request

a
b
to change

• The Summary in the proposed review look like this

• I have a similar behaviors while sending comment in the change request discussion:
  • while sending "Faudrait changer ça..." as a comment, I got this in the discussion :
    

Do not hesitate to ask me more details if needed.
Best Regards