SUMMARY
Akonadi Birthday Resources closes unexpectedly on boot. it happpens frequently but not at all boots

STEPS TO REPRODUCE
1. Boot (May be after a kernel or related package update - not sure)
2. Notification of Akonadi_Borthday_resources crashed unexpectedly.

OBSERVED RESULT
Akonadi_Borthday_resources crashed unexpectedly

EXPECTED RESULT
Akonadi_Borthday_resources shouldn't crash at bootup.

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 4.19.32-1-lts
(available in About System)
KDE Plasma Version: 5.15.3
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2

ADDITIONAL INFORMATION

Application: akonadi_birthdays_resource (akonadi_birthdays_resource), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd910bad4c0 (LWP 972))]

Thread 4 (Thread 0x7fd8fffff700 (LWP 987)):
#0  0x00007fd914e877a4 in read () from /usr/lib/libc.so.6
#1  0x00007fd9134f4961 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007fd913544e40 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#3  0x00007fd913546636 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007fd91354677e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0x00007fd9153dacb4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007fd915383a8c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007fd9151c7569 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007fd91564eba6 in ?? () from /usr/lib/libQt5DBus.so.5
#9  0x00007fd9151c896c in ?? () from /usr/lib/libQt5Core.so.5
#10 0x00007fd9141e4a9d in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007fd914e96b23 in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd907fff700 (LWP 986)):
[KCrash Handler]
#6  0x00007fd914dd2d7f in raise () from /usr/lib/libc.so.6
#7  0x00007fd914dbd672 in abort () from /usr/lib/libc.so.6
#8  0x00007fd91500458e in __gnu_cxx::__verbose_terminate_handler () at /build/gcc/src/gcc/libstdc++-v3/libsupc++/vterminate.cc:95
#9  0x00007fd91500adfa in __cxxabiv1::__terminate (handler=<optimized out>) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_terminate.cc:47
#10 0x00007fd91500ae57 in std::terminate () at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_terminate.cc:57
#11 0x00007fd91518dbd1 in qTerminate() () from /usr/lib/libQt5Core.so.5
#12 0x00007fd91518f6a7 in ?? () from /usr/lib/libQt5Core.so.5
#13 0x00007fd9141e4a9d in start_thread () from /usr/lib/libpthread.so.0
#14 0x00007fd914e96b23 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd90fb88700 (LWP 977)):
#0  0x00007fd914e8bc21 in poll () from /usr/lib/libc.so.6
#1  0x00007fd91444e630 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007fd9144502db in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007fd910773989 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fd9151c896c in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007fd9141e4a9d in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007fd914e96b23 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd910bad4c0 (LWP 972)):
#0  0x00007fd914e8bc21 in poll () from /usr/lib/libc.so.6
#1  0x00007fd913546690 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007fd91354677e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007fd9153dacb4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007fd915383a8c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007fd91538bde6 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007fd916a67f6f in Akonadi::ResourceBase::init(Akonadi::ResourceBase*) () from /usr/lib/libKF5AkonadiAgentBase.so.5
#7  0x00005629720a79da in ?? ()
#8  0x00007fd914dbf223 in __libc_start_main () from /usr/lib/libc.so.6
#9  0x000056297209fb7e in _start ()
[Inferior 1 (process 972) detached]