Libformat version 7.143
XnView: MP 1.5.0 beta 4 64bits (Jun 29 2023)
Libformat version 7.150
OS: Windows 10 64-bit
For JPEG XL (JXL) files there is not support for ICC colour profiles.
Effect: display glitch
To reproduce:
1. Turn on color management in XnView MP settings
2. Download and extract this archive: https://dl.dropboxusercontent.com/s/pth6ujyfey6sxsx/ICC_profile_JXL.zip
3. If ICC profiles work correctly, JXL files with ICC profiles should look the same as sRGB PNG files. They don't.
Actual behaviour (bug): JXL files with ICC profiles do not display correctly
Expected behaviour: JXL files with ICC profiles do display correctly when colour profile support is turned on
Additional information: Software that displays them correctly: GIMP 2.99.15 Development Build and Krita 5.2.0 Prealpha
Thanks to your detailed description I can reproduce