Bugreport until 8.15

[DOGG1]

the damage reduction is never removed when buying another speed item

I mean only in this particular case:

base speed + goblin turbo adds 75 speed
base speed + upgraded speed adds 150 speed

but it does not stack, right? so wc3 takes the better one, upgraded speed...
thats base speed + 150, or if you see it like that, goblin turbo + 75

You say it chooses the upgrade speed because it's "better". You mean bigger value (150)? Then does that item override the gob turbo? It overrides the speed right? But does it completely remove all effects of gob turbo ie damage reduction?