Hi Chris, Thank you for your reply. If I keep Stabiliser unchecked, the app will still freeze. Maybe it happens only due to Pressure.
When I use Vector Brush Tool, Controller: Pressure, and draw fast, the app will freeze. Watch the video: https://drive.google.com/file/d/1E6AUzLqCif6b0469aMTtcY_xW_iYNygD/view?usp=sharing If Controller : None, the app is normal. My version: Affinity Designer 126.96.36.199 windows10 x64 wacom intuos3