0	LibObject::lh_callback	LibObject.cpp	53	0x46882a
1	LH_QtObject::callback	LH_QtObject.h	65	0x15a60116
2	LH_QtSetupItem::refresh	LH_QtSetupItem.h	65	0x15a4e4d3
3	LH_Qt_int::setMaximum	LH_Qt_int.h	73	0x15a5e686
4	LH_Dial::changeSelectedNeedle	LH_Dial.cpp	873	0x15a3cf1d
5	LH_Dial::addNeedle	LH_Dial.cpp	180	0x15a37a82
6	LH_Dial::setNeedles	LH_Dial.h	162	0x15a5c843
7	LH_MonitoringDial::updateNeedles	LH_MonitoringDial.cpp	102	0x15a34d28
8	LH_MonitoringDial::changeItemSelection	LH_MonitoringDial.h	33	0x15a51634
9	LH_MonitoringDial::qt_metacall	moc_LH_MonitoringDial.cpp	92	0x15a463fe
10	LH_CoreTempDial::qt_metacall	moc_LH_CoreTempDial.cpp	64	0x15a46888
11	QMetaObject::metacall	qmetaobject.cpp	237	0x6a205ff8
12	QMetaObject::activate	qobject.cpp	3278	0x6a2167b0
13	LH_QtSetupItem::changed	moc_LH_QtSetupItem.cpp	122	0x15a44601
14	LH_QtSetupItem::setup_change	LH_QtSetupItem.cpp	59	0x15a092a7
15	LH_Qt_QStringList::setup_change	LH_Qt_QStringList.h	87	0x15a5195f
16	LH_QtObject::setup_change	LH_QtObject.cpp	168	0x15a09c85
17	obj_setup_change	LH_QtObject.cpp	65	0x15a0968c
18	LibObject::obj_setup_change	LibObject.cpp	231	0x46a0a0
19	LibObject::event	LibObject.cpp	519	0x46bc1e
20	LibInstance::event	LibInstance.cpp	139	0x42cdb1
21	QApplicationPrivate::notify_helper	qapplication.cpp	4462	0x1e6bd88
22	QApplication::notify	qapplication.cpp	3862	0x1e696da
23	QCoreApplication::notifyInternal	qcoreapplication.cpp	731	0x6a201540
24	QCoreApplication::sendEvent	qcoreapplication.h	215	0x6a268258
25	QCoreApplicationPrivate::sendPostedEvents	qcoreapplication.cpp	1372	0x6a2025eb
26	qt_internal_proc	qeventdispatcher_win.cpp	497	0x6a2248e7
27	USER32!OffsetRect	C:\Windows\syswow64\user32.dll	0	0x768462fa
28	??		0	0x49c04d6
29	USER32!IsWindow	C:\Windows\syswow64\user32.dll	0	0x76846d3a
30	qt_fast_timer_proc	qeventdispatcher_win.cpp	429	0x6a22467e
31	USER32!AnyPopup	C:\Windows\syswow64\user32.dll	0	0x768477c4
32	??		0


Analysis:

#18 is a obj_setup_change for "Core Temp Dial [2]", "Value Item"

I think somewhere in all that clearing, updating and changing needle data, it changes something, which in turn causes another obj_setup_change