Even though most of the world has only recently become fully aware of the issues between Blake Lively and Justin Baldoni that began on the set of their movie, It Ends With Us, those close to them would obviously have known about the tensions as they were happening.
One of those people, obviously, would have been Lively's husband, Ryan Reynolds, who was working on Deadpool & Wolverine during roughly the same time period that Lively was filming It Ends With Us with Baldoni, who co-starred in and directed the drama. Reynolds hasn't commented directly on the lawsuit, but did hint at the toll the issues between Baldoni and Lively took on him while he was working on the latest Deadpool film.
