Pen input lag on SP1 is so bad that strokes are missed.
Bug: Pen input lag on SP1 is so bad that strokes are missed. OneNote never misses a stroke.
Note, the cursor when drawing in Plumbago never lags. However, it takes up to 1 sec for strokes to appear on screen. When strokes do appear, many ties entire strokes are missing.
Plumbago Support commented
The handwriting lag will be addressed in next release. We hope to release very soon.