Hi Aarik,
Thanks for taking the time to follow this. Got hit by the bug too (and I though I did something wrong!). Here's my story:
finished WMI and made peace with the Ogre Matron before ever setting foot in Dyrford, just after going through the Temple of Woedica
went back to Defiance Bay and proceeded with the main quest up to th end of The Man Who Waits
took a detour to Caed Nua and finished the Endless Paths, ending Desperate Measures amicably
finished Act II
went to Dyrford Crossing (still not having explored Dyrford proper nor talked to Rumbald or Trygil) and talked to the ogre; can't remeber what I said, but we parted on good terms
after some more exploring, finally got to Dyrford and talked to Rumbald just to get stuck in this bug (not being able to talk to the ogre again and Rumbald not seeing reason or believing my lie that I've slain the ogre)
Client version 3.05.1186 PX1 PX2-steam with WM1 & 2.
I don't have a save prior to entering the crossing, sadly but, for what it's worth, here's my current one: https://drive.google.com/open?id=0B771-HyDPTExX2Y0UnZ1b2pkX1E
Thanks!
