Convergence buff should not start until you actually gain Affinity

[Xekrin]

With convergence appearing randomly in the plains which may or may not be anywhere near enemies it would be quite nice to not watch it tick down while you locate a decent sized pack of enemies to slaughter, ya know?

It should not start the buff duration until you gain affinity of some sort, including such things as opening vaults, killing enemies achieving sub-missions, whatever.