Swim lanes and cards are not visible on a Visual Task Board for a few members. They do share the same roles, and the impacted user can see the records, vtb_cards and swim lanes from the UI16 vieew as a list or form. But on VTB, few cannot see those.
This is happening because there might be a user preference created for that user and for that specific VTB, to hide the swimlanes. As the swimlanes get hidden, the cards in them are also not shown.
Preference name: vtb.board.<VTB_BOARD_SYS_ID>.hiddenLanes
There is no such preference present for any other user and for this VTB. Hence it is not happening for them.
Customers can delete this user preference record. Then the user will be able to see the swim lanes and cards.