TYPO3 Core

In an installation the BE is on a different host than the frontend. When generating the split preview link a hook in t3lib_BEfunc::viewOnClick() is used by the workspaces module to point to the preview controller. The viewOnClick() function still tries to determine the view domain on its own and if there is a domain record that domain will be used.

Extensions like EXT:solr need domain records and in combination with viewOnClick() the split preview link will go to the frontend domain. While this was correct for the original preview, the workspaces preview needs to go to the backend domain.