I have 2 OS on my laptop, windows 10 and Ubuntu 16.04. I use 1 steam library folder for that both OS. But my questions is why my dota 2 always update after switch OS? The update size is always same. when I switch from windows to ubuntu update size is about 460MB and when I switch from ubuntu to windows update size is 846.4MB. Why it happens, can I make no update even if I change my OS with the same steam library?

I have 2 OS on my laptop, windows 10 and Ubuntu 16.04. I use 1 steam library folder for that both OS. But my questions is why my dota 2 always update after switch the OS? The update size is always same. when I switch from windows to ubuntu update size is about 460MB and when I switch from ubuntu to windows update size is 846.4MB. Why it happens, can I make no update even if I change my OS with the same steam library?