some h.265 Video playing slower that actual speed

[diyargulli]

hi dear hope are doing well, i am using ExoPlayer my video player playing some videos (on some devices) slower than the video's actual speed , wanted to test on your player but sadly same issue, and on other people's ExoPlayer apps works correctly, could you help?
whatsapp:
+9647503443968
email:
diyarg96@gmail.com
thanks