I must be the odd one out here. Mostly with Brittany at Plymouth, despite my telling a series of operatives on the way through, I have often ended up having to negotiate the ramp with attendant grounding.
Stena to Ireland on the other hand were exemplary; one operative even getting down on hands & knees to ensure clearance.
Think a lot depends on how busy they are, etc. No guarantees so it’s Pot luck as once you are on deck there is no time to argue.