How to use normal map decals?

[AllSubs16]

Hi!

Can someone explain me how to use normal decals (which are located in the Textures tab of the Shelf)? I put them in my Normal channel of the Brush tool - it actually works but I cant see the preview of the brush like there - https://support.allegorithmic.com/documentation/display/SPDOC/Normal+Map+Painting

Instead i got this:



What am I doing wrong?

PS I use Substance Painter 2.2.0 on a PC with Windows 8.1

[zurhoch]

the preview got bugged in 2.2, it got fixed in 2.3