SUMMARY

I have found poor behavior of Wayland when compared to X11 in the areas of post-sleep wakeup restoration, saving Konsole tab behavior between login sessions, and the inability to resize emacs windows.

STEPS TO REPRODUCE

System should be a fresh install that has never run X11.  

1.  Problem with respect to Konsole usage. 
1.a.  Ensure that System Settings > Session > "On login, launch apps that were open: [*] On last logout" is selected.  
1.b.  Now start multiple instances of Konsole and force multiple tabs in each Konsole window by using Control-Shift-T.  
1.c.  Within each tab in Konsole, "cd <different directory of choice>".  
1.d.  Now logout of Wayland and then login with Wayland.  When I do this I now see only one instance of Konsole regardless of the pre-logout greater than 1 Konsole quantity and that Konsole is not showing any tabs, nor does it show any directory location I had been working in prior to logout.  
Expected Result:  Multiple instances of Konsole should be observed and each Konsole should contain multiple tabs at directory positions that were previously set.  This is not an issue with X11.  

2.  Problem with respect to Wayland sleep and awakening. 
2.a.  Before I run what follows, I go to System Settings > Appearance & Style > Colors & Themes > Login Screen (SDDM) and I choose "Kubuntu" and enter whatever image I want into "Change Background".  
2.b.  I also start gkrellm and set the sticky bit.  (This is done by right-clicking on the gkrellm titlebar, and in the resulting popup selecting "General", the "Properties" tab and then selecting "Set sticky state", then click "Apply" or "OK".)  Leave gkrellm running on the display.  
2.c.  Next place the system running Wayland into sleep mode.  
2.d.  Wake from sleep mode.  
Observations: Waking from sleep mode is glacially slow and does not fully recover. Returning from sleep mode I am greeted with a black desktop within which I can move a cursor and see nothing else.
I hit Control-Alt-F2 and see no change.
I hit Control-Alt-F3 and I am presented with a virtual terminal window and login.
I hit Control-Alt-F1 and now see two login screens using the background image I specified. The login screens are not completely filled out compared to the original login screens, meaning the username and user avatar image are not presented…just a black hole instead of an avatar image.  Clearly, waking from sleep mode should either move to the Control-Alt-F1 screen instead of the Control-Alt-F2 screen, or Wayland should default to use Control-Alt-F2 instead of Control-Alt-F1 for login, similar to X11. 
2.e.  Login. 
Observations:  Recovery of the desktop display is glacially slow. The areas previously occupied by gkrellm (sticky bit set to cover all virtual desktops) are black and remain so indefinitely. Time and date are not displayed in the taskbar contrary to the default.  I opened Konsole and executed “sudo journalctl -b 0 -r” and looked for “crash”. Gadzillions of crash statements associated with systemd. This is not an issue with X11.
From the journalctl output: 
Sep 23 12:10:46 <hostname> systemd[6172]: drkonqi-coredump-launcher.socket: Unit needs to be started because active unit sockets.target upholds it, but not starting since we tried this too often recently. Will retry later.
Sep 23 12:10:46 <hostname> systemd[6172]: drkonqi-coredump-launcher.socket - Socket to launch DrKonqi for a systemd-coredump crash was skipped because of an unmet condition check (ConditionUser=!@system).
[repeats the last statement at least 16 times and the first statement once, and does so every ten seconds] 
Expected Result: Very fast waking and recovery from sleep mode.  This is not an issue with X11. 

3.  Problem with respect to emacs window resizing. 
3.a.  Within Wayland, open a Konsole terminal and enter "emacs -fg yellow -bg black -cr red -geometry 80x40 $@ &".  This is using the emacs-pgtk package.  
3.b.  Attempt to change the size of the resulting window by placing the mouse cursor on any border or corner.  Attempt this several times from multiple borders and corners.  
Observation:  The resulting motion is limited to a "smidgen"...a highly technical term. ;-)  
Expected Result:  The emacs window should easily resize in all directions dictated by mouse manipulation.  This is not an issue with X11.  

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.04, Linux  6.14.0-32-generic #32-Ubuntu SMP PREEMPT_DYNAMIC 
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0 
Qt Version: 6.8.3

ADDITIONAL INFORMATION
HARDWARE: 
CPU: AMD Ryzen 9 9900X
GPU: NVIDIA GeForce RTX 5070
Mboard: MSI PRO B650-VC WIFI III
RAM: 32 GB DDR5
2 x 2 TB SSD WD_BLACK SN850X HS 2000GB w/ heatsink
Dual identical resolution monitors used side-by-side forming single desktop.