Hello,
This happens in Affinity Photo and in Afinity Designer in Pixel Persona.
When selecting a bigger size brush the screen starts to flicker and then goes black until I change tools with the keyboard.
I'm using Windows 11, and an Intel i3 processor 10th gen.
I've tried turning off acceleration and changing the Renderer from Intel UHD Graphics to WARP and doesn't solve.
I have the latest graphic drivers available installed.
I attach a video, with not too good of a quality showing me selecting the brush and alternating with other tools to show the glitch.
I don't know what is the problem. As I have the latest graphic drivers I can't do much on my part.
glitch.mp4