AVPlayer can't play HLS streaming with rate > x2.0 on OS 15.x

I'm using the AVPlayer to streaming video, same as:

            let strURL = "https://multiplatform-f.akamaihd.net/i/multi/will/bunny/big_buck_bunny_,640x360_400,640x360_700,640x360_1000,950x540_1500,.f4v.csmil/master.m3u8"

            if let url = URL(string: strURL) {

                let asset = AVAsset(url: url)

                let playerItem = AVPlayerItem(asset: asset)

                player = AVPlayer(playerItem: playerItem)

                let layer = AVPlayerLayer(player: player)

                layer.frame = viewPlaying.bounds

                viewPlaying.layer.addSublayer(layer)

                player?.playImmediately(atRate: 4.0)

            }

The video can't play, it'll play normal with rate <= 2.0 on iOS 15.x. Anybody can give me the advise to fix this issue?