Monthes after the original issue, we finally found the culprit.
Our vector tiles attributes are numerous and heavy. OGR has a fallback to increase simplification when compressed tile is over MAX_SIZE threshold.
As we have varying density and attributes in different area, and we switched compression in the same time, finding this was a challenge.
Kudos to Nicolas Delgado for finding this!
But hey, it was some nice kind of #accidentalArt #30DayMapChallenge
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@RegisHaubourg Hopefully https://github.com/OSGeo/gdal/pull/11392 should help making things more obvious ?
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@EvenRouault yeah! That would have helped indeed. We already saw notices saying "recoding tiles .... From xxx to xxx bytes" which put us on the right track
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