Dynamic imagery with rectangle bounds 1.90 to 1.116

Our app is currently using version 1.90 of Cesium. An issue that I’ve run into with trying to apply a rectangle (in order to limit the imagery to certain bounds) in WebMapTileServiceImageryProvider while using a dynamic template is that the first image has the rectangle applied but subsequent images in the sequence don’t have the rectangle applied and there are distortions in other parts of the globe in the form of stripes. There are various workarounds that are being considered, but is there any chance that this was a known issue that was addressed? Might upgrading our Cesium version help in this situation?

Thanks.