Wrong property association order in kimono files

[y-guyon]

Section 6.5.1 of HEIF says:

Readers shall allow and ignore descriptive properties following the first transformative or unrecognized property, whichever is earlier, in the sequence associating properties with an item.

However kimono files with transformative properties do not respect the proper property association order.
Example of kimono.crop.avif:

1. pasp (descriptive)
2. clap (transformative)
3. ispe (descriptive)
4. pixi (descriptive)
5. av1C (descriptive)

So according to the spec, ispe, pixi and av1C shall be ignored, which makes the file non-compliant to AVIF.