This is new with 3.0.357, but the tiling system does not longeur take care of ValueStyle changes
Here is the usecase:
Load a Map with Tiling on
Apply a ValueStyle 1
Pan/zoom to generate tiles
Apply a new ValueStyle 2 => the map change to reflect to change
Pan/zoom => this will use some tiles showing ValueStyle 1 and ValueStyle 2
Regards,
Patrick.