I never had a problem with the Nik Selective Tool in Ps CC 2018 till the 19.1.1 update. Now when I try to Paint (vs Fill) in a filter effect Ps CC won't let me do so. Every time I release the left mouse button (or pause painting) an error msg box pops up saying something like I must exit the selective tool to return to Ps. Does anyone know a fix? Also, not a Nik issue, I hate that my open images keep centering. I composite & like multiple images splayed around my workspace. I keep getting one big centered image that obscures the others. Is there a fix for that? I'm recently converted from Ps CS5 & may just not know how to deal with these 2 issues. So suggestions appreciated.
Same for me and it's the same in CC2017 just tested
There's a post here with a possible workaround
"I have found a very simple workaround for using NIK filters in brush mode with photoshop. Select the NIK filter you wish to use then after clicking the brush mode, immediately click "apply" then immediately click the filter's mask box. You can now use the brush mode as usual. (you may have to click once in the window frame to activate your brush). I have used this method dozens of times in the last few days without a hitch."