I bought a M10P 2 weeks ago as well, great phone, snappy and fluid, sleek. Never looked back coming from an S7. But I have the wifi issue as well, sometimes slow, sometimes it won't connect, sometimes it can't seem to load after leaving the phone there for an extended period. I went to huawei and got it checked, seems to be a wifi issue and they replaced me a new set. Now the new set has the exact same problem! Interestingly I have no such problems when I'm in school or in my hostel, only back home (where I have the Singtel AC1900 router). Currently monitoring the situation again after some tweaks and if it happens again,
Huawei is gonna come down and pick it up from me. Not sure now if its the phone or the router