Unclear error in android

[yonibs]

Hello
Android, Mapbox SDK 10.6.

Using custom style and everything looks OK in the web (GL JS).

But in android, unable to see road labels with the following error appearing:
E/Mapbox: [maps-core]: {MapboxRenderThr}[Style]: Failed to load tile 14/9785/6610=>14 for source custom_bg: feature referenced out of range key

The map shows , but the road labels are not visible and the above message pops up several times.
the style is vector tiles, based with zoom levels 8 to 14, while the road labels is in zoom level 14.
again, the same works great at the web, same style, same tiles.

what is the meaning of the message ? how to debug further ?

Yoni