Not a major problom, just a miner one.
Mine leaks from the countershaft if I fill it more than halfway on the dipstick. Below that, not a drop. But I think it needs a countershaft seal. For the time being I just fill it to half.
At a minimum, check your drive sprocket nut. It will cause a leak if loose, and worst case, I don't need to get into that. And they're often loose.