As if Astral Alignment couldn't get buggier, what with the incredibly slow bounty/quest tracking, loot being received at the end of the activity taking so long they sometimes don't appear until you've returned to orbit, and the recent Anteater errors booting people from the boss being known issues... another has seemingly slipped under the radar.
Upon completing an Astral Alignment activity and claiming the rewards from the Wayfinder's Trove, there is a likely chance that Wayfinder's Trove will not count towards your weekly powerful engrams... despite getting the rewards from it.
I don't know if this has anything to do with Ager's Scepter Catalyst being added to the Trove's loot pool, but this is a mildly annoying bug.