Re-docking sub-windows isn't possible in Wayland, and switching from X11 to Wayland causes black screen due to SDDM

I'm a relatively new Linux user having just switched from Windows 22H2 over to Fedora 39 KDE Desktop spin several months ago. My chosen Graphics Platform is Wayland. My problem is, Calibre's E-book Editor has the GUI option of undocking two sub-window panes (which I accidentally did while exploring the application) and I cannot figure out how to re-dock them within Wayland. I tried switching to X11 to re-dock the undocked sub-windows, and even though I was successful in redocking the undocked sub-windows, they re-undock themselves after switching back to Wayland.

About switching back and forth to and from Wayland and X11, there exists yet another problem: Even though I'm able to successfully switching from Wayland to X11, switching from X11 back to Wayland however requires a reboot otherwise the set SDDM causes the screen to go completely black which then requires me to force me to shutdown my laptop in order to reboot it.

Please fix these two issues. Thank you for your time.

As of this writing, my current system specs is as follows:

• Operating System: Fedora Linux 39
• KDE Plasma Version: 5.27.10
• KDE Frameworks Version: 5.113.0
• Qt Version: 5.15.12
• Kernel Version: 6.7.4-200.fc39.x86_64 (64-bit)
• Graphics Platform: Wayland
• Processors: 4 × Intel® Core™ i3-7100U CPU @ 2.40GHz
• Memory: 15.4 GiB of RAM
• Graphics Processor: Mesa Intel® HD Graphics 620
• Mesa version: 23.3.5

I'm unable to find out what's the installed Wayland version is, unfortunately.