Perhaps when switching on the unit, we could either:
Assign a default profile to work when tuner is first selected until the unit finishes loading.
Make the first performance available (and restricted to only that performance) while the rest of the unit loads.
If we use a single default profile assignment, that might also be available on a long press or button combination for on-stage recovery. Maybe pressing Input and Output at the same time could activate the "emergency" profile.