Why won't nested group memberships from MSAD resolve in IDCS?

UPDATED POST: (Note, original issue was misidentified as nested IDCS groups not resolving in EDMCS, however that was incorrect.)

We use MSAD bridge to IDCS. In our MSAD we make use of nested groupings (groups within groups where a parent group has both users and other groups as children). However, our nested groups are not resolving in IDCS and there appears to be no ability to even manually accomplish the nesting effect on the IDCS side. Ideally, our groups (including nested groups) would resolve in IDCS exactly as they are in MSAD; that's the ultimate goal. However, if anyone knows of a manual workaround, at this point I'd be grateful even for that.