Muramana Bug

I've been playing ezreal lately and have noticed that when you have your muramana toggled on and you die when you respawn it is still "on" but the icon doesn't show that it is. I find myself having to toggle it on and off and on again just so that i can see and know that it's on. It's a minor thing but I feel like it shouldn't be like that. I haven't tested it out on any other champion but it happens every time i play ezreal.

Hope this gets read ^.^