Can't save the page anymore after a server restart

As an XWiki application developer I often do this:

• open a wiki page in edit mode (e.g. edit a JSX object)
• restart the server to put some modified JAR (e.g. WebJar)
• continue editing the page I had previously opened and use the Alt+Shit+S shortcut to save the page
• the save fails with a notification at the bottom of the page (due to invalid CSRF token, which is normal)
• at this point I use Save & View to save my changes and then open back the page in edit mode

Starting with 11.2 I get a popup with this message at the last step:

An authorization error occured when performing this action. Your might have been logged out since you started to edit this page.

and I can't save the page anymore. I need to reload but this means I can loose my changes. If my changes are not in a single place (e.g. multiple JSX and SSX objects) then copying them is not easy. This is really annoying and a very serious regression IMO.

Note that we added the $services.csrf.getResubmissionURL() API specifically to be able to force a save when the CSRF token gets invalidated.