Hey Tony!
Sorry for the late reply, I did try setting the actor dropdown to player, and that didn't really work either... but I ended up finding a solution after some tinkering!
So, for some reason, If i un-ticked the "Dont Destroy on Load" checkbox on the "other settings" of each of the dialogue managers I was using in each scene (I had one in each scene for testing purposes) and the conversations played as intended! I can't say for sure I understand WHY this worked, especially since there aren't any significant changes between the different dialogue managers themselves, but hey! I'm just glad that I was able to get it working and hit the ground running afterward!
Issue starting new conversation when changing scenes
Re: Issue starting new conversation when changing scenes
That may cause problems in the future, but you can probably avoid them by using the save system to change scenes. If you do this, put the Save System component (and its dependency components) on a GameObject separate from the Dialogue Manager.