I've got more than 4000 hours playing this game so I am not surprised, please forgive me for this post but I have to report a sort of bug that caused my Griffin death.
Flying up in the sky, no enemies around, still almost full stamina, pitching up, all good, the griffin suddenly just died.
There's not much more to say, it just instantly died for no reason. I've heard a hit sound like receiving damage from who knows what, and then I was immediately on the ground with the dead body of my griffin at my side. Tamed early in the morning on Ragnarok210, transported to TheCenter348 where I am actually playing, levelling it up for few hours. Time well spent, as always.
Is it lag? I doubt it. I was chasing a Santa gift box and everything was moving normally with no lag sign. Even if it was, there's nothing that can kill a griffin like that.