Missing items on the timeline

Hello. I use this cool library for showing events but I have a problem. One of my event is missing on the timeline in different times. It has been replicated for big zoom index, for example zoomMin=zoomMax= 119831072 ms. I displayed some links on the screenshot http://prntscr.com/4nd8mx As you can see,I checked that event exists in Timeline object but it is not displayed. But If I move timeline slowly to another day and then return to the first position the event could be displayed. Move to another day -> http://prntscr.com/4nd6i1 Return -> http://prntscr.com/4nd6v3

I'm afraid that another events can be hidden. Please help.