Merchants don't turn hostile after a thief's stealing ability fails

Couldn't find a similiar report here, so there it is:

Current behavior:
When you fail to steal something, the merchant's trading window get closed but he doesn't turn hostile immediately. If you pause the game right after the trade window has been closed you can interrupt the merchant turning hostile by talking to him right after resuming the game.

Expected behavior:
If you fail to steal, the merchant should turn hostile and after that the trading window should get closed.