TVBS smoother landing

Hello, I’m asking about a prototype in development.
it’s a plane VTOL TVBS.
When he’s landing in automatic in qrtl mode and he touches the ground with the tail and then drop the nose to the ground.
The problem is that it should lay on the ground slowly but he slammes the nose so hard that he broke my servos on the testing phase.
what can be done for a smoother landing?
The prototype is similar to the one in the video
https://youtu.be/CH6t1Uxa4Fw
Thank you in advance