[Titan 2] Touch screen bug

Hi team, I've found a touch screen bug, how do I report it to Unihertz?

There appears to be a vertical line in the middle of the screen where slow drags will be interrupted.

Best illustrated as below, with a drawing app and slowly drawing lines across the screen.

https://preview.redd.it/4yy5anoi0jzf1.png?width=1436&format=png&auto=webp&s=9497b1df6f30cdaf42c22ffa680cf4d7bfd4d076

https://preview.redd.it/pfou0poi0jzf1.png?width=1436&format=png&auto=webp&s=1c22b3b30682d3759bfccf7f9cfc80b60cb6af27