SUMMARY
Not sure if helpful, but the crashes are related.

I have these crashes in coredumpctl in sequence:

Wed 2022-04-27 01:31:43 EEST  68326 1000 1001 SIGABRT present  /usr/lib/org_kde_powerdevil                                                           >
Wed 2022-04-27 01:31:44 EEST  68332 1000 1001 SIGABRT present  /usr/bin/plasmashell                                                                  >
Wed 2022-04-27 01:31:46 EEST  68390 1000 1001 SIGABRT present  /usr/lib/org_kde_powerdevil                                                           >
Wed 2022-04-27 01:31:46 EEST  68389 1000 1001 SIGABRT present  /usr/bin/plasmashell                                                                  >
Wed 2022-04-27 01:31:48 EEST  68403 1000 1001 SIGABRT present  /usr/lib/org_kde_powerdevil                                                           >
Wed 2022-04-27 01:31:48 EEST  68410 1000 1001 SIGABRT present  /usr/bin/plasmashell                                                                  >
Wed 2022-04-27 01:31:49 EEST  68419 1000 1001 SIGABRT present  /usr/lib/org_kde_powerdevil                                                           >
Wed 2022-04-27 01:31:49 EEST  68426 1000 1001 SIGABRT present  /usr/bin/plasmashell                                                                  >
Wed 2022-04-27 01:31:50 EEST  68435 1000 1001 SIGABRT present  /usr/lib/org_kde_powerdevil                                                           >
Wed 2022-04-27 01:31:51 EEST  68453 1000 1001 SIGABRT present  /usr/bin/plasmashell

OBSERVED RESULT
With the following backtraces:
Core was generated by `/usr/bin/plasmashell --no-respawn'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f34fe7b434c in __pthread_kill_implementation () from /usr/lib/libc.so.6
(gdb) thread apply all backtrace

Thread 1 (Thread 0x7f34f9f09540 (LWP 68453)):
#0  0x00007f34fe7b434c in __pthread_kill_implementation () from /usr/lib/libc.so.6
#1  0x00007f34fe7674b8 in raise () from /usr/lib/libc.so.6
#2  0x00007f34fe751534 in abort () from /usr/lib/libc.so.6
#3  0x00007f34febf4ee4 in qt_message_fatal (message=<synthetic pointer>..., context=...) at global/qlogging.cpp:1914
#4  QMessageLogger::fatal (this=this@entry=0x7fff6a346a30, msg=msg@entry=0x7f34ff61a029 "%s") at global/qlogging.cpp:893
#5  0x00007f34ff1b4a65 in init_platform (argv=<optimized out>, argc=@0x7fff6a346a20: 221677568, platformThemeName=..., platformPluginPath=..., pluginNamesWithArguments=...) at kernel/qguiapplication.cpp:1254
#6  QGuiApplicationPrivate::createPlatformIntegration (this=0x563f0d3a8bb0) at kernel/qguiapplication.cpp:1481
#7  0x00007f34ff1b5089 in QGuiApplicationPrivate::createEventDispatcher (this=<optimized out>) at kernel/qguiapplication.cpp:1498
#8  0x00007f34fede708b in QCoreApplicationPrivate::init (this=this@entry=0x563f0d3a8bb0) at kernel/qcoreapplication.cpp:835
#9  0x00007f34ff1b5147 in QGuiApplicationPrivate::init (this=this@entry=0x563f0d3a8bb0) at kernel/qguiapplication.cpp:1527
#10 0x00007f34ffa344ae in QApplicationPrivate::init (this=0x563f0d3a8bb0) at kernel/qapplication.cpp:513
#11 0x00007f34ffa345d4 in QApplication::QApplication (this=<optimized out>, argc=<optimized out>, argv=<optimized out>, _internal=<optimized out>, this=<optimized out>, argc=<optimized out>, argv=<optimized out>, _internal=<optimized out>) at kernel/qapplication.cpp:501
#12 0x0000563f0c9eb328 in main (argc=<optimized out>, argv=0x7fff6a346f38) at /usr/src/debug/plasma-workspace-5.24.4/shell/main.cpp:82

AND
Core was generated by `/usr/lib/org_kde_powerdevil'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007fa28db1134c in __pthread_kill_implementation () from /usr/lib/libc.so.6
(gdb) thread apply all backtrace

Thread 1 (Thread 0x7fa287d77a80 (LWP 68435)):
#0  0x00007fa28db1134c in __pthread_kill_implementation () from /usr/lib/libc.so.6
#1  0x00007fa28dac44b8 in raise () from /usr/lib/libc.so.6
#2  0x00007fa28daae534 in abort () from /usr/lib/libc.so.6
#3  0x00007fa28df51ee4 in qt_message_fatal (message=<synthetic pointer>..., context=...) at global/qlogging.cpp:1914
#4  QMessageLogger::fatal (this=this@entry=0x7ffc3f5ddff0, msg=msg@entry=0x7fa28e9f5029 "%s") at global/qlogging.cpp:893
#5  0x00007fa28e58fa65 in init_platform (argv=<optimized out>, argc=@0x7ffc3f5ddfe0: 1214179440, platformThemeName=..., platformPluginPath=..., pluginNamesWithArguments=...) at kernel/qguiapplication.cpp:1254
#6  QGuiApplicationPrivate::createPlatformIntegration (this=0x5607485ec8c0) at kernel/qguiapplication.cpp:1481
#7  0x00007fa28e590089 in QGuiApplicationPrivate::createEventDispatcher (this=<optimized out>) at kernel/qguiapplication.cpp:1498
#8  0x00007fa28e14408b in QCoreApplicationPrivate::init (this=this@entry=0x5607485ec8c0) at kernel/qcoreapplication.cpp:835
#9  0x00007fa28e590147 in QGuiApplicationPrivate::init (this=0x5607485ec8c0) at kernel/qguiapplication.cpp:1527
#10 0x00007fa28e590edc in QGuiApplication::QGuiApplication (this=<optimized out>, argc=<optimized out>, argv=<optimized out>, flags=<optimized out>, this=<optimized out>, argc=<optimized out>, argv=<optimized out>, flags=<optimized out>) at ../../include/QtGui/../../src/gui/kernel/qguiapplication.h:203
#11 0x00005607467080be in PowerDevilApp::PowerDevilApp (argv=0x7ffc3f5de380, argc=@0x7ffc3f5de29c: 1, this=0x7ffc3f5de300) at /usr/src/debug/powerdevil-5.24.4/daemon/powerdevilapp.cpp:48
#12 main (argc=<optimized out>, argv=0x7ffc3f5de380) at /usr/src/debug/powerdevil-5.24.4/daemon/powerdevilapp.cpp:155

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3
Kernel Version: 5.17.4-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620