The filter uses the Foreground and Background swatches (Tools panel). With the Filter Gallery closed, use the keyboard shortcut "D" to reset the swatches to the defaults of B&W. (There is also an icon just above the Foreground swatch.) Then try your filter again.
immediate fix thank you so much I never would have figured that out haha
The filter uses the current foreground color for the effect. If you press 'D' first, to set the colors to the default black and white, it should give what you're used to.
solved it straight away thank you so much!