When making quick short strokes the brush outline cursor is replaced with the standard mouse pointer cursor, on a layer that has a mask enabled. This doesn't seem to be an issue when the layer's mask is disabled or when the brush is changed to crosshairs.
I primarily use photoshop to paint, and while I don't use layer masks every day, it is definitely an issue when I am working on a piece that is quite detailed.
I found a fix for myself on this but others could try. I turned off the generator plugin in preferences and it totally stopped it. It will turn the plugin back on when exporting an image but I would just turn it off again so I could work without annoyance. Thankfully I've not had this issue at all since getting a new work computer. Hope this helps someone.