
If you try to steal from the same person twice you will be immediately detected and will aggro the victim into. Once you pickpocket someone once you cannot do it again. Going over the limit aggros the victim of the thievery immediately. He, and everyone else in the same faction or attitude group (I don't know the technical term used for BG3) as him then turn hostile even if you leave before he turns hostile. There is a weight and value limit dictated by your thievery skill how much can be stolen.

Whats happening in the case of this blacksmith is that he has unvoiced voice barks about a theif and "put that back", then eventually turns hostile. Whats supposed to happen is that anyone you steal from will open a dialog with a party member near by, and you have option to talk you're way out of the situation. Browse their wares through the shop before Pickpocketing then so you know what to steal and where it's located in their inventory. Can give you a unique pair of gloves ('Fancy Gloves') given the right responses in dialog with her. Actually is a pickpocket and wants to rob you. Claims to have lost her a pouch with 250 gold meant for supplies and asks you to help her find it. The downside to Thievery is supposed to be that you can only pickpocket someone once per act, not really a downside tho. If you try to steal from the same person twice you will be immediately detected and will aggro the victim into a fight because of their paranoia. Dashing June is a NPC in Divinity: Original Sin 2. You can have 11 Thievery by act 3 (unless they changed any of the uniques for DE). So it is much easier to pickpocket/pass dialogue checks with her nearby and that ability active. Once you pickpocket someone once you cannot do it again. instead of adding +10 to stealth, it adds +10 to all skill checks, including pick-pocketing and most dialogue checks. Note that ShadowHearts "Pass without a Trace" ability is broke. Maybe Guex is dead in your game or something? Or maybe it doesn't happen to me as I almost always unchain my thief when they are stealing so the whole party doesn't get blamed for their actions. Not sure if this is related to Guex (Stands near Wyll). I'm not saying there may not be some bug related to something else, but I am able to steal his gold and the grove does not turn hostile.

There is a period of about 30 seconds where vendors look for a thief and if they don't find one, they return to their stalls. Guex normally runs over and the Blacksmith says "You just missed him". I unchained my thief, pick pocketed him and then sent my unchained thief to hide in the prison.
