debugger freezes on X (arm) - qt

Question

I am developing an application for Olimex A20 with Qt 5.7. This app needs to run on X. If I just run the application it works perfectly fine. The issue is with the debuging - debugger freezes. This is the stack trace I see when I interrupt the debugger.
This is the line of code where the debugger is waiting for something to happen (qwaitcondition_unix.cpp - line 143).
code = pthread_cond_wait(&cond, &mutex);
This is the main stack trace from thread #1
1 __libc_do_syscall 0xb5dd6514
2 pthread_cond_wait * *GLIBC_2.4 0xb5dd1da6
3 QWaitConditionPrivate::wait qwaitcondition_unix.cpp 143 0xb63a7a44
4 QWaitCondition::wait qwaitcondition_unix.cpp 215 0xb63a7a44
5 QSemaphore::acquire qsemaphore.cpp 143 0xb63a2dba
6 QMetaObject::activate qobject.cpp 3708 0xb6506c6e
7 QMetaObject::activate qobject.cpp 3602 0xb6506fee
8 QDBusConnectionManager::connectionRequested moc_qdbusconnectionmanager_p.cpp 141 0xb3baf2a0
9 QDBusConnectionManager::connectToBus qdbusconnection.cpp 225 0xb3b6b37e
10 QDBusConnectionManager::busConnection qdbusconnection.cpp 134 0xb3b6b488
11 QDBusConnection::sessionBus qdbusconnection.cpp 1195 0xb3b6c058
12 DBusConnection::DBusConnection dbusconnection.cpp 73 0xb3e08a4c
13 QSpiAccessibleBridge::QSpiAccessibleBridge bridge.cpp 66 0xb3dff070
14 QXcbIntegration::accessibility qxcbintegration.cpp 337 0xb3dc563c
15 platformAccessibility qaccessible.cpp 485 0xb6a4ae34
16 QAccessible::isActive qaccessible.cpp 791 0xb6a4ae34
17 QQuickTextInputPrivate::emitCursorPositionChanged qquicktextinput.cpp 4206 0xb6eb5fde
18 QQuickTextInputPrivate::moveCursor qquicktextinput.cpp 3264 0xb6eb9d76
19 QQuickTextInputPrivate::setCursorPosition qquicktextinput_p_p.h 407 0xb6eb9e2a
20 QQuickTextInput::setReadOnly qquicktextinput.cpp 682 0xb6eb9e2a
21 QQuickTextInput::qt_static_metacall moc_qquicktextinput_p.cpp 1180 0xb6f593e8
22 QQuickTextInput::qt_metacall moc_qquicktextinput_p.cpp 1257 0xb6f59cf8
23 QQmlPropertyPrivate::write qqmlproperty.cpp 1254 0xb68a648a
24 QQmlPropertyPrivate::writeValueProperty qqmlproperty.cpp 1183 0xb68a7594
25 QQmlBinding::write qqmlbinding.cpp 333 0xb68f38da
26 QQmlBinding::update qqmlbinding.cpp 197 0xb68f46fc
27 QQmlObjectCreator::finalize qqmlobjectcreator.cpp 1202 0xb68faf92
28 QQmlComponentPrivate::complete qqmlcomponent.cpp 926 0xb68a861e
29 QQmlComponentPrivate::completeCreate qqmlcomponent.cpp 962 0xb68a8698
30 QQmlComponent::create qqmlcomponent.cpp 788 0xb68a85ac
31 QQmlApplicationEnginePrivate::_q_finishLoad qqmlapplicationengine.cpp 136 0xb68f55fc
32 QQmlApplicationEnginePrivate::startLoad qqmlapplicationengine.cpp 115 0xb68f57a4
33 QQmlApplicationEngine::load qqmlapplicationengine.cpp 260 0xb68f57de
34 main main.cpp 50 0x1fd60
This is thread #6
1 __libc_do_syscall 0xb5dd6514
2 pthread_cond_wait * *GLIBC_2.4 0xb5dd1da6
3 _mali_osu_lock_wait 0xb61ec7fe
4 __egl_worker_thread 0xb61e7096
5 start_thread 0xb5dcd5dc
6 ??
0xb5ffd71c
Anyone came across this issue? Any pointers would be appreciated.