I have a custom floating tray, T1. T1 contains the Components dialog.
When I click on "Display the secondary selection pane option at the top right of the Components dialog, the second components dialog appears below the primary dialog (as it should).
When I exit SU 2023 with both dialogs displayed and then restart SU 2023, only the primary dialog is displayed. The previous view settings are not being saved. In previous versions of SU, the second dialog was always visible on restart.