Metahuman 4.27 Animation Post Process BP Issue

Hello!

I have made few MH animations inside Maya and exported for Unreal 4.27. In Maya all looks good but in Unreal there are some weird deformations on the legs in the animations where I have the characters sitting. For example on the tight area where the legs join the hips and at the knees. I have uploaded a picture to show the problem. If I disable/enable the post process blueprint for the animation I keep getting the 2 results as shown in the picture.

I have tried to see how it works in Unreal 4.26 and with the post process BP disabled everything looks good as in Maya. The problem is that I can’t switch versions at this time so I need to find ways to make it look better in 4.27. I am a bit stuck and really hoping you can help me out on this.

Thanks in advance!