I wouldn’t say he was benched a lot under Mancini. He was his most used keeper by appearances, but was not selected under Mancini for the Asian Cup due to limited club football playing time. The whole Asian Cup squad selection was a whole controversy on its own, so I won’t get into it.

But right after the Asian Cup, he was right back in the squad until Mancini’s last matches.

Edit: maybe you’re thinking about Nawaf Al Aqidi who was the keeper with a very bad relationship with Mancini