The pattern of

boost::optional<PauseDuringStateTransitions> stateTransitionsGuard =
    PauseDuringStateTransitions{controller(), _donorStates};

is leading the destructor of the PauseDuringStateTransitions to be called earlier than expected and unsetting the desired pause during donor state transitions. This is causing various timeouts and fassert()s with the StepDownStepUpEachTransition test case. We should disable it until the usages of PauseDuringStateTransitions are fixed and any other fallout is addressed.