Help: problem with "soft light effect" after export

Hi all,

I'm experiencing a problem with a gradient I've made once the project is exported. Basically I have got two different levels using the same gradient, which is using th effect "soft light". The gradient works fine on level 1 locally and after export. But on level 2, though it's exactly the same condition, the gradient behaves differently. See pictures below:

Locally

After export

Anyone ever experienced something similar? Any idea how to fix this?

For now I have removed the gradient, but it does not look as nice.

Thanks,