Blocks are not persisted on save action and clicking on add icon triggers a save warning

[ichim-david]

With a simple volto app created and using only volto-dropdown menu as seen in the following package.json
https://gist.github.com/ichim-david/d42165da776faa6f1774bbc57e9243b4

When I try to add a block as soon as I click on the add icon I get a save action as seen in the screenshot

I then add a listing block and I hit the save icon trying to save

Then I add a new menu item

And when I go to check the previous menu item the block data is gone both from edit on missing in view

[ichim-david]

@nzambello I know that package.json uses volto 9 however I have another project where I use 10.9 and it behaves the same.
There I have a bunch of volto-slate plus volto-slate-addons and I though that maybe it interfered with this package given that
it's another text editor however even on this clean project it behaves the same.

[ichim-david]

@giuliaghisini ^

[giuliaghisini]

@giuliaghisini ^

because you've to use this volto's branch formFnOnUpdateFormData that is waiting to be merged in master

[ichim-david]

@giuliaghisini on further inspection of your comment I realized that you were referring to a branch within volto core
https://github.com/plone/volto/tree/formFnOnUpdateFormData
Still there is no mention of such a branch needed within ticket package.

I will try to have a look and see if I can figure out further what is happening.