I could not reproduce this, in or out of combat.
Are you using any other mods? If so, does this happen if you create a new profile, and start a new game without other mods?
Try verifying local files: in the Steam library, right click on the game and select Properties, switch to the Local Files tab and then click on the 'Verify Integrity of Game Cache...' button.
Try browsing to the '..\Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition\LevelCache' folder and delete the contents.