> Every block of a JPEG XL image is effectively a small tile,
Operative word here is "small", so it has different effect, thus doesn't imply same sensitivity trigger
Operative word here is "small", so it has different effect, thus doesn't imply same sensitivity trigger
These seams are especially noticeable in the background, and align with coded block edges. You can tell the encoder is trying to conceal them as best as it can, but this cannot be properly mitigated without a proper deblocking filter.
For comparison, AV1 tiles normatively go through the deblocking filter.