That thread described how these reward-delayed events have never worked properly, I’d been reporting problems with them as far back as May 2023, and suggested they stop doing this sort of event or make the rewards claimable as soon as the success conditions were met…
I’m just as frustrated as you are by this reoccurring, possibly even more so, because I’ve been reporting this as broken for over a year now. The fact that Blizzard refuse to either fix it, or make the rewards instantly claimable, gives a clear indication that they have no intention of fixing it.