Lid-driven cavity with flexible bottom (2)

I want to run 3D driven cavity which from MPCCI ,but meet problem.
first, I will introduce my case is as follow:

and my precice_config.xml is :

so , I’m currently only able to run 14 time steps using the above settings and parameters, and then the abaqus displacement goes negative, and I’m not sure why this is happening? The following is the displacement curve at the center point of the coupling surface.

@uekerman I know you have some experience on it ,can you give me some advise? the solid materials too soften, I am afraid precice 2.5 can’t handle it!

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