You should probably delete that message as community editors will definitely remove it and warn you. Trust me, I’m letting you know from experience.
I can see the plane is not balanced, if you are not relying on precise collision with the plane, I recommend Making a separate part about the size of the plane, make that part invisible, unanchor it, and weld it to the plane mesh.
From there, do as @Cyafu suggested and make the plane massless. Adjust the CustomPhysicalProperties of the invisible part since you are working with physics so it flows as smooth as you want it.