Wrong vertical mouse position for CV64/3D with 1280x1024 screen size

[FatsieFS]

Describe the bug
When using Cybervision64 3D emulation and selecting a 1280x1024 screenmode the vertical mouse position is not corresponding with the actual position. Horizontal position is OK.
The mouser pointer can only be moved down to the middle of the screen but then it actually clicks at the bottom of the screen.
This is using Amiberry on a HD image from a real A4000.

To Reproduce

• Select CyberVision 64/3D [Zorro III] (Phase 5) as RTG board
• Install driver
• In Prefs/ScreenMode select 'CV64/3D: 16bit 1280x1024'

Expected behavior
Vertical mouse location to represent the click position

Desktop (please complete the following information):

• OS: Mint 22.2
• Version: Amiberry 7.1.1