Some Qt apps crash in mir_create_menu_window_spec (parent == NULL)

$ sudo apt install miral-examples kate
$ miral-app
[in the app terminal] $ gdb kate

Expect: kate runs
Actual:

Thread 1 "kate" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
58 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007ffff25da77f in __GI_raise (sig=sig@entry=6)
    at ../sysdeps/unix/sysv/linux/raise.c:58
#1 0x00007ffff25dc37a in __GI_abort () at abort.c:89
#2 0x00007fffe1463b78 in mir::require(bool) ()
    at ./src/include/common/mir/require.h:28
#3 0x00007fffe1463b78 in mir_create_menu_window_spec (connection=
    0x555555959f40, width=640, height=480, parent=0x0, rect=0x7fffffffcb90, edge=mir_edge_attachment_any) at ./src/client/mir_surface_api.cpp:79
#4 0x00007fffe1716f31 in ()
    at /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqpa-ubuntumirclient.so
#5 0x00007fffe17180eb in ()
    at /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqpa-ubuntumirclient.so
#6 0x00007fffe170506b in ()
    at /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqpa-ubuntumirclient.so
#7 0x00007ffff3f200c9 in QWindowPrivate::create(bool) ()
    at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8 0x00007ffff46e5585 in QWidgetPrivate::create_sys(unsigned long long, bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9 0x00007ffff46e4d7d in QWidget::create(unsigned long long, bool, bool) ()
    at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007ffff46e51e9 in QWidget::winId() const ()
    at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5