Can't set font with setFont when font is defined in stylesheet

Reproducible: always
Platform-dependent: no
Regression: yes
Introduced: 8u20b08
Workaround exists: yes

Steps to reproduce (run attached sample):
1. Create stylesheet, define font for ".root" there and assign it to a scene.
2. Try to change font of a text component (e.g. TextArea) with setFont.
Expected behavior: font is changed successfully.
Actual behavior: font is changed and switched back to a font from stylesheet.

Workaround: apply font with setStyle("-fx-font-...");