I'm working on an assembly with 3 sub assemblies, that uses a design table to pull different configurations of a part. The parts are made with external reference with the envelope.  The parts are getting updated correctly in the sub assembly while switching between the configurations. My problem is that while working in main assembly, the parts in the sub assembly with external reference with the envelope are not getting updated while switching between the configurations. The last configuration is still active even even after change the congiguration.

Please do the needful.