I have a lot of points to draw on the map, i adopt the composite symbol to render the points.The composite symbol composed of pictureMarkerSymbol and textSymbols。All the points have the same url of picture, while i found some pictures have missed .
Is this a bug of composite symbol.
The number of points in my project is more than 1000.
eq1:When numbers of the points is small, none of the pictures is missing.

eq2:when numbers of the points is more than 1000, there comes the problem.
