I noticed when I put a strong Corruption on a target (trinket, haste proc, etc. etc.), I’m not able to refresh it, because I spam it on 5-10 targets (while leveling), so it just drop off.
Is this just me (probably an addon perhaps?) or is this also for other specs?
when you apply it with the buffs it is a stronger spell than the one you are using to refresh it early, same happens with Curse of Agony if you are trying to refresh it when its scaling up on the final ticks.
However - I would be curious if you have the same issue with the automatic refresh when you cast shadow bolt?