VTOL plane pitch oscillation

I’m developing the Y3 tilt VTOL plane. I have encountered a problem with the pitch axis, which exhibits oscillations when the plane is flying in the air.
I have attempted to modify the PID values several times, but the oscillations remain. I would appreciate any help or guidance on how to resolve this issue.
I have included all the log files and videos for your reference.

Thank you so much for your time and support.

FC-Matek-F405-se

Video & Log file