SUMMARY:
after installing plasma 5.17.4 I've noticed that

* the 'return' key did not work in all cases.  When I start typing my PW and press return I get logged in.  But when I click before or after I've entered my PW into the PW field enter does *not* work anymore


STEPS TO REPRODUCE
1. Press Ctrl-Alt-L to activate the lockscreen
2. Type the our PW
3. Press enter
4. You're logged in. Good! As one expects

4. Repeat 1-2
5. Click into PW field
6. Press enter
7. Nothing happens -> Bug

8. Now Press Tab to transfer focus to [>] Button
9. Press enter
10. Nothing happens -> Bug


OBSERVED RESULT
Nothing happens

EXPECTED RESULT
One is logged in


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon User / Plasma 5.17.4
KDE Frameworks 5.65.0
Qt 5.13.2 (kompiliert gegen 5.13.2)
Das xcb Fenstersystem

ADDITIONAL INFORMATION
After clicking into the PW field or pressing (several) times Tab to give the PW field or [>] focus, the only way to unlock the screen is to click on the [>] button.