If you talk to Eder (the dialogue that triggers him to join your party) after completing the "Lord of a Barren Land" quest, favoring Kolsc, Eder's dialogues won't be adjusted to the fact that Roedric is dead and Kolsc is a new lord. Mostly it results in phrases in line of "I'm the next one to hang" (even though he's standing right next to the group of people who just removed the corpses from the tree) and "Kolsc is on the run"
Steps to Reproduce the Issue:
1) Complete "Lord of a Barren Land" quest by killing Roedric
2) Return to the gilded vale
3) Talk to the animancer dwarf for the first time
4) Talk to the Eder