Using Affinity Photo 2.4.1, on Windows 10 Pro 22H2, 32GB RAM, Intel i5 9600KF CPU
Graphics card is NVIDIA GeForce 1060 w/ 3GB RAM
Hardware acceleration is On (Doesn't happen when Off)
Reproduction instructions:
Open a JPG image (I use 24MP from my Fuji X-T3
Add Live Filter of Clarity as a children of the image (I set it to 25%)
Add a mask as a child of the filter
Invert mask to all black
Use a while brush, around 800px, 50% opacity, 11% flow, 6% hardness
Brush quickly (using a mouse or Wacom tablet), and program crash and close. No message shows.
Let me know if you need any more information.
Thanks.