I believe the one lost in France was being flown by a Boscombe crew who were investigating just that phenomenon.
Oh, like they investigated the Sea King that rolled over and, blow me down, when they applied the same inputs, theirs rolled over as well!
Despite being warned not to try to replicate the incident, they lost a PR9 when it did exactly what it said on the tin
Buccanner at Subic Bay as well, to check a certain stores fit, after one had been launched from a carrier with a stores fit that didnt quite work.
Remind me again: what makes pilots so smart...