TYPO3 Core

When creating a new content element of type "fluid content" with a multiRelation field, the field's suggest wizard cannot be used unless saved first.
I've reported this to the flux project: <flux:field.multiRelation> autocomplete breaks when fluidcontent element not saved yet #1272

The underlying issue was described by Claus Due:

The source of the problem is the rewritten FormEngine which no longer provides a full or partial record (full if saved, partial with default values if not saved) to the hooks which resolve the DS.
Because this vital variable is no longer transmitted to hooks, Flux becomes incapable of resolving the correct DS based on CType or other parameters of the not-yet-saved record.

This in on TYPO3 7.6.15.

Please pass the relevant parameters to the hooks.