QML Qt Positioning memory use after free() / double free()

In example app that showcases various QML examples. After running the Qt Positioning demo after iteration with other demos, the program aborts with (info from gdb):
#0 malloc_printerr (str=0xb5fc6468 "corrupted double-linked list") at malloc.c:5659
It is running on Qt 6.5.6 on 32 bit ARM Linux.

We recompiled this QML example with Qt 6.5.3 (the latest open-source 6.5 version) on x86_64 linux, and the issue persists.