Happens only after the first start.
1. Start AP, create a new document.
2. Pick Paint Brush Tool. I guess it would happen with other tools too.
3. Draw a wavy line (like in the attached video).
Result: The line is not wavy, but more or less straight. Only start and end point seem to be correct. If hardware acceleration is turned off, everything works normal. Hardware specs see my signature.
initiallag.mp4