Xperia Z2 :: No Internet Connection While Tethering Since Update

I bought a z2 a few weeks ago and really liked it, everything worked well, including tethering... but since the latest android update, the tethering has stopped working.
 
When trying to tether, my computer connects to the phone, but it says 'no internet connection'. I am on the 3 network and use tethering a LOT for work... I have checked all the settings on my phone and changed the APN type from ''default,supl,mms,a-gps' to 'internet+mms' as suggested here: [URL].....
 
But it made no difference. I dont know what else to try? It seems like there are a few others with the same issue. I am having to take the sim card out and put it in my old phone while at work so I can connect to the internet via tethering...