Red Timeline highlights not visible / disapear

[mduering]

http://histograph.cvce.eu/#/e/EkMNDA2D2g
(1)
Red Timeline highlights are not visible in ego network view and in the default graph view. Only after I refresh the page they appear.

(2)
When switching to Ego Network and returning to the page using the browser back button (Chrome/Firefox), the red timeline highlights are no longer visible. Again, refreshing the page fixes this.