It was claimed by a poster on Reddit today that the aircraft arriving tomorrow morning, departing as ID6014 from CBR - DPS tomorrow (October 13) will be the final Batik Air flight to Canberra, however I can't find any official announcement about it.
Having a look at Batik Air's official website, they do not have any flights available for booking from CBR after tomorrow's service, and nor are any results returned in Google Flights either.
Unless this has just been an error relating to the loading of flights, it looks like this route could potentially be coming to a premature end after just 4 months.
Edit - now that I have looked in a little bit more detail, it appears that this route is open for booking for dates between December 18 and January 8, with 3 flights per week scheduled during this period.
Perhaps it might be becoming a seasonal route? It seems like there is definitely something happening here.