Split Pane: Active panel loses focus after drag and drop

1. Open Thunar.
2. Enable View -> Split View.
3. Open A on the left, open B on the right.
4. Select the first file on the left panel, select the first file on the right panel.
5. Click on the left panel.
6. Drag-and-drop a file from the left panel to the right panel.

Which panel is active now? Ok, let's check.

7. There are actively selected files on the left panel, there are actively selected files on the right panel.
8. Visually, the focus is on the left panel.
9. What does the location bar say? A, i.e. we are on the left panel.
10. What if we press Right button?

• The location bar changes to B. We are on the right panel.
• The right panel's selection changes (the left one doesn't).

11. Otherwise, what if we press Backspace button or click the toolbar's Open the parent directory?

• The left panel's location bar changes.
• The left panel's file list view changes.

Which panel is active?

P.S. Should tryto start from another panel at p.5...

Thunar 4.18.8