seekTo restarts audio stream

I'm using ExoPlayer 2.11.8, but I tried the latest version as well, the result is the same I have an MP3 file on the server https://xp4stm90bvzr.frontroute.org/s02/images/audiobooks/1/8/1/files/01--glava-1.mp3, to access the file you need to specify headers user agent and referer = "https://audiobook-mp3.com/". When loading ProgressiveMediaSource sets isSeeking = false and isLive = true. Other files work fine. I already tried setting Mp3Extractor.FLAG_ENABLE_CONSTANT_BITRATE_SEEKING and setConstantBitrateSeekingEnabled = true didn't help