I've since found that connecting a HDMI cable to the mb port to monitor seems to fix this, I can still default to using the add on video card to monitor by DP cable when at home but somehow having that second connection resolved this issue.
I've since found that connecting a HDMI cable to the mb port to monitor seems to fix this, I can still default to using the add on video card to monitor by DP cable when at home but somehow having that second connection resolved this issue.