Hi Camilla,
I just tried to replicate a similar case to yours by moving a rigid wall in x-direction by 3 mm to contact and deform a flexible block (fixed at one end). The behavior between the wall and block is frictional with coefficient of friction of 0.3. I see the expected deformation of 3 mm. I included a screenshot on my outline tree below for your reference and hoping it will be helpful for you.
