When first talking to Vicent Agosti in the Vailian Embassy as part of the quest "The Child of Five Suns" and selecting option 1 "Ambassador, please hear her out." or option 2 "Quit stonewalling and pay attention for once!" no further text loads. Choosing option 3 "Remain silent." continues the conversation as normal.
NOTE: Pressing spacebar when this happens continues the conversation.
Screenshots and a save immediately before to encountering the bug (just walk up)
https://www.dropbox.com/sh/o2b3wsmugqk2e5a/AACcCz8my4odbYXfbn7GZxD3a?dl=0