Whenever I draw lines, the strokes shift to the left a little and vanish in some cases. I had to redraw part of the 'H' in the above gif as an example. Does anyone know how to fix this?
I use a Mac OS X and a Watcom Cintiq 16. This problem does not show up in any other program (photoshop, illustrator...) aside from animate. I'm using the latest version 21.0.4. I also recently uninstalled and redownloaded the Watcom driver, but the problem persists.
Hmm you've done everything right in terms of troubleshooting.
Have you tried calibrating or recalibrating your Cintiq?
I recalibrated the tablet, but the strokes continue to shift slightly. However, it's exclusive to the Animate program so I don't the Cintiq is the issue.
What's your screen mode settings in AnCC?
It should be the same as what you have displayed on your screenshot.