| Follow these steps to reproduce:
- Edit the same page with two users, Alice and Bob
- Alice inserts an information box and types some content inside
- Alice opens the Macro Edit modal for the inserted information box to update the CSS class parameter, without closing it
- At the same time Bob also opens the Macro Edit modal for the same information box and updates the CSS class parameter
- Bob submits the changes just before Alice
Expected: Alice's value for CSS class parameter should overwrite Bob's value, but the information box content should remain unchanged Actual: both users get a rendering error that the information box content is missing The reason is this: when Alice submits her changes, instead of updating the existing information box macro, it actually inserts a new macro (with no content) that overwrites the previous one which has been updated in the meantime by Bob. |
