ATSB report of a ground resonance accident on an A109E conducting pilot transfer from a ship in Australia in February this year:
https://www.atsb.gov.au/publications...rt/ao-2025-009
Unrelated, but I witnessed ground resonance on an AS350B years back. It developed rapidly after the helicopter touched down. But the pilot reacted swiftly and took off again. He would have been on guard during his next landing attempt which went without incident.