resume does not work properly after pausing for a long time (more than 5 minutes)

I'm currently building a rtmp / http dynamic streaming player with drm enabled based on the osmf framework and i ran into a issue that the resume will fail to play the movie after pausing for a long time. the pause and play works normally most of the time when only pausing for short periods.

When the issue happens, the player does not throw any error. When i listen to the underlying netstream events, the netstream.play event was actually being thrown. but the Play_STATE_CHANGE event listener never picked up the play event as expected.

Anyone know what might be the cause of this?