Ran both of the above Seasonal Objectives multiple, multiple times, tried being party leader, tried being solo, no difference. Objectives just won’t complete.
After some research I see this is old news, and the bug persists, even after multiple patches. Its literally the only Objectives I have left for the final Season completion, and its endlessly frustrating that this is known, and hasn’t been fixed yet.
Tl;dr, this is a bump of an ongoing bug, just by another author.