I tested it some more and here is what I've found:
Test 1.
Load a save where Player Character is outside the tent, and who needs to speak to the queen. This is the beginning of Act 2.
Enter the tent, and after exhausting all the dialogue options, Daeran does not appear.
Test 2.
Load the same save.
Enter the tent. Player Character is now inside the tent. Save. Quit to menu screen.
Load this new save. Talk to the queen and after exhausting all the dialogue options, Daeran appears.
So, in other words, the bug does not appear if I make a save immediately after entering an area or room, then quit to the menu screen, and then reloading the new save.
This suggests the game is still held together by duct tape and a prayer, if the player has to proactively save and reload upon entering a new area just to prevent bugs like this.
Still need your save through a bugreport. Please send it and give me the wording :)