Moving the mouse only moves the mouse pointer on an iPad down right.

Description

When using open-source tinypilot connected to an iPad and moving the mouse over the black "No Signal" window on a Mac browser, the mouse pointer on the iPad moves. But even when I draw circles, the mouse pointer always only moves to bottom right. Keyboard works as expected, I can use <meta + h> to go to the Home Screen and <meta + space> for search.

What's the behavior that you expect?

Mouse movement is mirrored to the iPad.

What's happening instead?

Mouse movement only goes to bottom right. Even a click moves the mouse pointer a bit.

What are the steps to reproduce this behavior?

1. Install "Raspberry Pi OS Lite" on "Raspberry Pi Zero 2 W"
2. Run

curl --silent --show-error \
  https://raw.githubusercontent.com/tiny-pilot/tinypilot/master/get-tinypilot.sh | \
  sudo bash - && sudo reboot

(add'l sudo to avoid hundreds of "[can not remove](rm: cannot remove '/tmp/tmp.0rxb...': Permission denied)")
3. Connect Raspi to iPad using Apple "Lightning to USB 3 Camera Adapter"
4. Open TinyPilot in MacOS Firefox
5. Move mouse over black window
6. See how mouse pointer on iPad only moves down right with every move

Screenshots

n/a

Logs

Link

The issue names no source files or tests. Start by reproducing the Raspberry Pi Zero 2 W, iPad, Lightning adapter, and Mac Firefox setup, then inspect the linked logs for the mouse-movement failure. Done means mouse movement and clicks over the TinyPilot window are mirrored correctly on the iPad.