Loosing the follow of the waypoints on flight plan

flybywire airplane : the flight start from lgav rwy 03r and inside the flight plan i have these waypoints KRO G33 NEVRA Z507 OSMOS these are from simbrief
the problem is until go to kro normaly reduce nautical miles but after kro does not turn to g33 and start increase nm just straight by loose the flight plan.
why ?