1.6.5: Closing/reopening XnView MP with the Source panel closed makes "Favorites" tab appear

[KLE-France]

XnView: MP 1.6.5 - 64 bit
OS: Windows 64 bit

Only the "Folder" and "Catalog Filter" are active in my Source panel as vertical tabs (View > Panels: only "Folder" and "Catalog Filter" checked (and "Vertical tabs" toward the bottom)).

I have the "Show source panels" button installed on the main toolbar ("ToolBar 1"), so that with a simple click, I can close and open the source panel (great feature, by the way). This works perfectly with one exception:

→ If I close the source panel (by deactivating the "Show source panels" button), then close XnView MP with that source panel still closed, when I re-open XnView MP, and then re-open the source panel (by reactivating the "Show source panels" button), the "Favorites" tab appears (View > Panels: "Folder" "Catalog Filter" AND "Favorites" will now be checked (and "Vertical tabs" toward the bottom)).

This does not happen within any one session. As long as XnView MP stays open, the Source panel can be activated and deactivated with no issues. It's the closing of XnView MP that makes the issue appear.

To reproduce:
1. Limit "Source panel" to only "Folder" and "Catalog Filter" as vertical tabs (or not; I haven't checked beyond my case)
2. Install "Show source panels" button on the main toolbar (or not; idem; I haven't tested to see if this happens when using the menus)
3. Deactivate the "Show source panels" button to close the Source panel
4. Close XnView MP
5. Re-open XnView MP
6. Reactivate the "Show source panels" button to re-open the Source panel

Actual behaviour (bug): The "Favorites" panel tab will now be present in the Source panel's tabs

Expected behaviour: The Source panel should re-open as it was during the last session with XnView MP

[xnview]

[xnview]

Thanks to your detailed description I can reproduce the problem.

[xnview]

This problem is supposed to be fixed in XnView MP 1.8.1. Please check and confirm the bug fix here.