How to set up a sliding mesh?

I am solving a test problem on a moving mesh.

As an example, I consider a problem similar to the problem of train moving through tunnel, described in "HW2022.0 - Release Highlights: HyperWorks CFD". (https://www.youtube.com/watch?v=tnUCJ4mOAfs&list=PLGNemB0NFb0BpCdoafrR6_tujpMxoOfSq&index=15) 

It has two solid bodies (fixed and moving {spatial motion}). For the inner surface of a moving body (train), the displacement of the surface is set. An interface surface is defined between the bodies.

The problem is that the mesh between these bodies does not slide relative to each other, but deforms, which leads to the "Severe distortion in specified mesh" error. Setting the interface surface as a sliding surface doesn't help.

I attach the calculation model below. (The mesh has been removed) 

Please tell me how to solve this problem. What model settings were entered incorrectly?