Did you try it in single player, with one main character far enough away they were not involved in the conversation?
If you email supportdos@larian.com, with a save at the wishing well (or a Dropbox or Google drive link, etc) I can take a look at it.
You can zip the save in the '..\Documents\Larian Studios\Divinity Original Sin Enhanced Edition\PlayerProfiles\<ProfileName>\Savegames_patch' folder, or use the
D:OS EE Analysis Tool to generate a report.zip file, and delete all but one of the included saves (double click the zip file to open it in Windows Explorer, then browse down to the savegames and savegames_patch folders).
For the latter, extract the downloaded zip file somewhere and run AnalysisTool.exe. When that loads, browse to the install folder (if it is not automatically detected), optionally run the tests first, and then generate a report (it will be saved in the same location as the Analysis Tool).