Some types of stuns can't even be stagger escaped. Be on the lookout for crumple stuns and faint stuns, they can't be SE'd and force a must-hold situation.
Free Step Dodge
KING JAIMY
KING JAIMY
Well actually only the crumple stun forces a must-hold situation. The faint stun just guarantees one or more follow-ups.
Lulu
Yeah about that.... technically its called the "Falling Crumple Stun".... the normal crumple stun actually can be Stagger Escaped.