Basically, the map tile server is unstable to render different tile picture, we have different parameter value to instruct the tile server to render different style of pictures ( as you see the orange and green icon), but the tile server will randomly show the wrong style of it.
Basically, the map tile server is unstable to render different tile picture, we have different parameter value to instruct the tile server to render different style of pictures ( as you see the orange and green icon), but the tile server will randomly show the wrong style of it.