[TASK] Follow-up: Preserve vendor name in refering request

Change-Id: I7101206dad7f2137d23dccd4c013bd4a32a2faf6
Resolves: #52900
Releases: 6.2
Reviewed-on: https://review.typo3.org/24846
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters