@Override
    public Bitmap get(int width, int height, Bitmap.Config config) {
        final Key key = keyPool.get(width, height, config);

        return groupedMap.get(key);
    }
A strategy for reusing bitmaps that requires any returned bitmap's dimensions to exactly match those request.
core/src/main/java/com/bumptech/glide/load/engine/bitmap_recycle/AttributeStrategy.java