Sorry for the late reply. I was using the last version from Wacom's website, that is 6.3.27-2 I guess. I say I was, because I changed my desktop, installed a fresh system and all software, and currently I'm working only on my Huion. It works just fine with SP, and so I'm afraid to install my Wacom again to check if the issue will occure again, at least before I finish my projects :-P