Hey, after starting the new Wrath of the Druids DLC (before I had finished the base game) I got to the Blood Bond quest and escorting Barid back to his "castle." I decided part of the way back that I should finish the main game and pick up Gungnir and Mjolnir before going back, and save Wrath of the Druids for when I could stream it for my friends and we could react to it together. I fast-travelled back to England and finished the main game, overwriting my previous save files.
When I came back to Ireland to return to WotD I found Barid stuck at the graveyard and I was unable to interact with him (I had already spoken to him and cleared the ambush before fast-travelling away.) After save-quitting to see if that would fix it, Barid was suddenly back in Dublin, standing at the cliff next to his "castle." I was still unable to interact with him, though I was able to nudge him part of the way towards the open door of the longhouse. He then promptly power walked back to his spot on the cliff. Decided to record it for evidence and here we are. Video below, forgive the low quality, I only just reinstalled OBS and I wasn't going to make my settings flawless to record a single 3 minute video for a bug report.