This has been an issue for a while now. The blur brush tool adjustments in the tool bar (opacity, hardness and flow) don't seem to be doing anything. I've been using affinity photo now for about 7 months now. This never used to be an issue - the opacity, hardness and flow sliders would all have an effect on the blur brush tool. However all of the sudden, one day they stopped working and the blur brush tool is stuck on max blur! Can anybody tell me why or how to fix this? Note: these adjustments work just fine on paint brushes, burn/dodge brush tools etc its only an issue with the blur tool.