I made a post about this during the Solstice event, along with video of Envious Assassin and Reconstruction not working together. Was informed it was a known issue. Was curious if a Bungie rep could provide an update? Really want to load 6 rockets in a tube (not practical at all, but the things we do for smiles).
Seems like it'd be the intended function since both perks work off the base magazine size
Reconstruction can load up to 100% more magazine, so up to 2 Rockets
Envious Assassin loads up to 200% magazine, so up to 3 Rockets
Neither of these perks make those new values your base magazine size, since these are variable amounts at any given time while you're playing
Something like Bipod sets your base magazine to 2, since it's a new fixed amount. If you had something like Bipod + Envious, that could get up to six Rockets
Not saying they won't change it, but the perks are definitely working as they should