Elevated blacks on iPad M4 when HDR (Beta) turned on

[predprey2]

Describe the bug
When HDR is turned on in the Moonlight app, perfect black is not completely dark. When screen resolution is not perfect fit, the streamed screen shows a very slight difference in brightness against the border. Not sure if it has something to do with the 1 nit brightness feature on newer Apple devices. The effect is very slight, and the switcher bar at the bottom may make the difference hard to see until it is hidden with guided access and the screen is viewed in a dark room, but the streamed perfect black is definitely not 0 nits with HDR turned on. With HDR turned off the blacks are completely dark, but the HDR picture is displayed wrongly of course.

Steps to reproduce
Turn on guided access on iOS to hide the switcher bar if necessary. View in dark room.

Affected games
Tested fullscreen black made with Micrsoft Paint and viewed with Microsoft Photos, Win11 24H2.

Other Moonlight clients
Doesn’t seem to occur on iPhone 14 Pro Max.

Moonlight settings (please complete the following information)

• Have any settings been adjusted from defaults?
• If so, which settings have been changed?
  Full resolution, 120fps, 150Mbps
• Does the problem still occur after reverting settings back to default?
  Yes

Device details (please complete the following information)

• iOS/tvOS version: 18.2
• Device model: iPad M4 13" Standard Glass 256GB

Server PC details (please complete the following information)

• OS: Windows 11 24H2 26100.2605
• Sunshine version: v2024.1230.200248
• Nvidia GPU driver: 566.36
• Antivirus and firewall software: Windows Defender and Windows Firewall