Ghost of Tsushima has been updated to version 2.18 today by Sucker Punch. You can get the complete patch notes for this update here.
This patch is available for both PS4 and PS5. It implements fixes for the Legends mode, which is the multiplayer expansion for Ghost of Tsushima that was released for free post-launch. It is also available as a standalone product and was made available for all PlayStation Plus subscribers earlier this year. Take a look at what has been fixed in this update below.