Quit in GUI application on linux in qt 6.8.0 does not quit and process runs indefinitely

Have a GUI application which was working fine in previous versions of Qt (6.5.3), upon closing the window with the X in the corner or clicking a quit button that calls close() on QMainWindow, using a static Qt 6.8.0 build the application does not actually exit, I have to ctrl + c the terminal in where I ran it:

  8356 pts/1    S+     0:00 ./AuTerm
If i run the same executable in gdb then it seems to exit normally.

Attaching gdb to the process after having clicked quit gives:

__cp_end () at src/thread/x86_64/syscall_cp.s:29

warning: 29     src/thread/x86_64/syscall_cp.s: No such file or directory
(gdb) bt
#0  __cp_end () at src/thread/x86_64/syscall_cp.s:29
#1  0x0000000001ba9dc5 in __syscall_cp_c (nr=202, u=<optimized out>, v=<optimized out>, w=<optimized out>, x=<optimized out>,  
   y=<optimized out>, z=0) at src/thread/pthread_cancel.c:33
#2  0x0000000001bb45f5 in __futex4_cp (to=0x0, val=2, op=128, addr=0x7ffca8379fb4) at src/thread/__timedwait.c:24
#3  __timedwait_cp (addr=addr@entry=0x7ffca8379fb4, val=val@entry=2, clk=clk@entry=1, at=at@entry=0x0, priv=128, priv@entry=1)
   at src/thread/__timedwait.c:52
#4  0x0000000001baa1cf in __pthread_cond_timedwait (c=0x7f02d2280eb8, m=0x7f02d2280e90, ts=0x0)
   at src/thread/pthread_cond_timedwait.c:100
#5  0x000000000184a6cb in QWaitCondition::wait(QMutex*, QDeadlineTimer) ()
#6  0x000000000183c819 in QThread::wait(QDeadlineTimer) ()
#7  0x00000000015b975d in QDBusConnectionManager::~QDBusConnectionManager() ()
#8  0x00000000015b924e in QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager>::~Holder() ()
#9  0x0000000001b97ede in __funcs_on_exit () at src/exit/atexit.c:34
#10 0x0000000000469212 in exit (code=0) at src/exit/exit.c:29
#11 0x0000000001b97a8b in libc_start_main_stage2 (main=0x469300 <main>, argc=1, argv=0x7ffca837a1a8)
   at src/env/__libc_start_main.c:95
#12 0x0000000000474fbb in _start ()