Kill with a surprise attack (Method. Shoulder strike) does not work (Assassin's Creed: Valhalla)

Good day.

On the well-known version of the game, there was a bug when, after learning the Shoulder Bash ability, which can be studied in raids, it ceases to fury a sudden kill with a hidden attack. It doesn't matter if the setting is on / off. to kill any enemy, with a hidden murder, it will save 10% of HP.

Is there a varix to be repaired? In addition, it will roll back on save games before studying the Prechom Strike or buying a license.