JFXCheckBox Fill Background Not Transparent when select

[halim]

i am using jfoenix 1.9.1 (last version) , when use JFXCheckox component i see after selected it's still fill (in old version of jfoenix < 1.9 : just le MRAK appear and fill background is transparent ) , so i what to knows the issue to make background or fill to transparent and just the mark appear (i customise a css wiht class .jfx-check-box but not thing happen)