Not sure if this a bug or not..
But when playing Kayn, if you die after earning the ability to transform, your death timer isn't shown on your portrait. I realise this may be because there is that timer to tell you how long you have left if you want to wait for your other form, but maybe it could be greyed out if you're dead? It just feels inconsistent. I know your death timer is on your portrait above the minimap but still.