Is this in multiplayer or singleplayer?
Do you have a save made just after this happened? Even better would be a save in combat before this happens, where ending a turn or taking some series of actions would give at least a reasonable chance of reproducing this.
If so, please email supportdos2@larian.com with the save (or a Dropbox or Google drive link, etc). If you playing on PC and using any mods, also include a list of those enabled and/or the modsettings.lsx from your profile folder.
Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition\PlayerProfiles\<ProfileName>\Savegames\Story' folder.
In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder' (and similarly for macOS/Finder).
PS4 saves can be sent, as well, but they would need to be transferred to a USB flash drive first.
In the Saved Data in System Storage section of the Settings menu, click Copy to USB Storage Device, select the relevant save(s) and Copy. From there you can zip the files, then copy to email or upload somewhere and provide a link.