Missing Arrival/Departure Times for Stop Rank 8 in SMART (Main Line) for agency SA (Sonoma Marin Area Rail Transit) GTFS Data

I'm working with the GTFS data for the  SA  agency, specifically the  SMART (Main Line)  route, and noticed an issue with two trips:  t_5996464_b_84104_tn_0  and  t_5996659_b_none_tn_0 . 

Both trips are missing  arrival/departure times  for stop  rank 8 , which is a platform. Since this stop is included in the stop_times.txt file with a distance covered value, it should have valid arrival and departure times.

According to the  GTFS  specifications, arrival and departure times can be  omitted  only if  start_pickup_drop_off_window  or  end_pickup_drop_off_window  are  defined , which is not the case here. Therefore, arrival and departure times should be provided for stop rank 8.

Could someone clarify if this is indeed a data error or if there's another condition under which times can be omitted in this scenario? Thank you for your help!

I have attached the missing field row for reference.