The issue might be with turbulence model and corresponding y+ use to create the inflation layer.

When using low-Re models or any models with enhanced wall treatment, the average Y+ value should be on the order of ~1 to ensure we are capturing the laminar sub-layer. When using wall function models, the Y+ value should ideally be above 15 to avoid erroneous modelling in the buffer layer and the laminar sub-layer. High quality numerical results for the boundary layer will only be obtained if the overall resolution of the boundary layer is sufficient. 

I suggest to please check the y+ corresponding to the turbulence model used.

you can also create an additional variable for the eddy viscosity ratio. Then by plotting this variable , and superimposing mesh in the near-wall region, we can visualize the boundary layer resolution.

Thank you