Petenorris

I have been experiencing odd artefacts appearing on the screen when painting in pixel mode (Affinity designer) (see video attached). I have restarted Designer, and tried with a new document but still getting the same issue. The brushes are basic, but I am using pressure with apple pencil. Only thing I haven't tried is re-installing app, but that seems a little drastic. Looking forward to your response. VID_20190902_152103.mp4