When you add a Woody snippets block in Gutenberg, you can select the snippet you want to use in the dropdown menu and optionally enter the attribute values in the "Block" section. This works well however if you update the page and then come back to it later, the block always shows the first snippet in the dropdown menu even though the correct snippet has been saved in the database. Strangely enough, if you reselect the correct snippet in the dropdown menu, the values you had entered the first time for the attributes appear in the "Block" section. I am only using PHP snippets so I don't know if it's also the case with Text and Universal snippets.
Jean
Jean