Mouse only controls camera

Hi,

I'm having a problem with controls for DA:I on PC.

Instead of having to click and drag to rotate the camera around my character, the mouse now only controls the camera and I do not need to hold down the mouse button to do so.

I've been able to play this way for a little while using keyboard controls but it has been annoying as I cannot access any potions other than health, command my whole party to attack/disengage or interact in any conversations that do not have numbered response options (Ie the ones you can move during)

The mouse controls work just fine in inventory, map, tactic screens, on the war table and when the looting option comes up.  I have tried changing the control options in the main menu and creating a new character, but the problem persists.

I'm now stuck in a party banter with no option to exit without giving an answer but because the responses aren't numbered I can't interact...

I have no other controls or devices plugged into the USB and have played through twice with the current wireless keyboard and mouse set up without issue

Thanks for any help you can suggest