Exported AVIF files are corrupted

[GdzieJestStach]

All exported files in AVIF format are corrupted and can't be viewed in Windows (with AC1 codec installed) and on Android phone (gallery, instagram - can't read the files).

Both systems read other AVIF files from the Internet correctly.

Sample corrupted AVIF files generated by Lightroom CC attached in link (as they can't be attached here):

https://drive.google.com/drive/folders/1nb_1i1jYrpKLtW6Ytobwnz6yNz4OWn8T?usp=sharing

[Friedhumanpie]

Also experiencing this, AVIF files render very strangely post export - appear to be exporting only a gain layer? Example from prior poster as rendering on my machine and my own export below -

Chrome refuses to render at all, Firefox surprisingly renders them though in SDR only. My own AVIF export itself shared at https://drive.google.com/drive/folders/17RCGMctq1yMOSiDnlzYE5NKFLWE8eWDZ?usp=drive_link - have replicated with various image sources, and across all lightroom installs (CC, classic, app)

[Friedhumanpie]

Additions, software versions -

Camera Raw 17.0
Lightroom classic version 14.0.1 Build 202410161356-30922cfc
Lightroom version 8.0 Build 20241003-1027-def78b5

Exported with and without hardware accel to the same result. However, 3080ti and Nvidia driver version 566.14
Windows 11 Version 10.0.26100 Build 26100