Found in Version 11.3.7.0
Resolved on 8/17/2022. (Release Version: VDM 11.3.8.0)

Bug:  After the fix was applied for MDS Sort, the grouping for MDS stopped working.

Fixed: The functions to create group statements, ClientSideSortStatement, SortStatement, were all clearing the grouping by fields. Previously, this was not an issue as the order of processing was grouping >= sorting. With MDS sorting, this process happens much later and ended up clearing out the grouped fields.