Child elements of Material Design themes have incorrect font color

[amoamare]

As shown above, the textbox on the top left is the default settings.
The textbox on the bottom left is after the MaterialDesignBody has been applied manually.

The two on the right are to show the default and with MaterialDesignBody applied manually as you can see no change.

Also it becomes apparent when using the dark theme as shown below, looks like it applies to most of the child label's "TextBox,TextBlock, Combobox, CheckBox etc"

[andregr15]

anyone have any ideias to solve this?