Expand/Collapse button not showing on Kanban Board with Issue detail view open

We are using your pluing and it helps us very much, because we have too many cards on our board.

The problem is when I open any issue on the board in the Detail view and than reload the board - the Expand/Collapse button is not visible anymore. I have to close the Detail View and reload the board again.

Is there any chance to correct this behaviour? Thank you very much. J.Do