[Q] Defaults settings are broken on NP? topic

Seems like "Use always" option do not work on NP...
Just reinstalled the system from a scratch and the bug still there.
F.E. using Mizuu (or any other app) trying to select MX player as the dafault player, but fails - it continue asking all the time.
Is it only me or it is known bug? Any workout to fix it?