In CustomWidgetBase.php we have formMultipleElements removing empty items from field state. This works find outside of when a custom_field is attached to a multi-valued paragraphs field. The latter scenario seems to result in the removal of the only item on paragraphs form ajax updates which leads to loss of data in the first item. It's particularly noticeably broken when on of the sub-fields is of type entity_reference with target_type media and using the media library widget but other field structures result in bad behavior.
Add a multi-valued custom_field to a paragraph type. Add a multi-value paragraph field to a node containing that type. Add a node and add a paragraph, then add a second paragraph and notice the first one's custom_field values are not preserved.
1. Set a more unique $processed_flag variable in formMultipleElements to contain the parents.
2. Add a condition to check for empty($field_state['array_parents']) before decrementing $field_state['items_count'].
Active
3.0
Code
luke.leber → made their first commit to this issue’s fork.
Issue #3479254 by apmsooner, luke.leber: Multi-cardinality processed...