SteamVR Hand skeleton in UE4

[FabulousPotato]

Hello,
I'm quite new to steamVR and this is my first time using this. I'm using a steamVR skeleton (on UE4) for hands. It works fine with knucles on vive etc, but on oculus when touching the trigger the index finger "hides". This also happens in some poses designed in blender. While in blender everything looks fine, in ue4 I get this:

all the aux bones and tip bones have no influence on vertexes.
The same pose in blender looks like this.

I am honestly out of ideas.

[FabulousPotato]

I solved it, it was a Blender problem after all, can be closed.