VLC does not plays sound on some part of webex recordings

VLC does not play some part of webex recordings converted to MP4. Other media players plays it normal like windows media player. its not full part of voice; just some small partions within video. like voice goes on 01:59 and comes again 02:14 goes for a while normal again and happens same thing. wanted to add sample file but its 12.24 MiB and 10MiB allowed.