Are you Australian? Did you read the article you referenced? It says this:
"...Wing Commander Michael Grant, Commanding Officer of Number 75 Squadron, said the purpose of Exercise Elang AUSINDO 17 is to enhance, develop and promote the international engagement between TNI-AU and RAAF. “Our squadron has enjoyed a close working relationship with the Indonesian Air Force through Exercise Elang AUSINDO,” Wing Commander Grant said. “Routine engagement such as this ensures that the relationship between our air forces is fostered at the individual level, as well as between our organisations.” First held in 1995, Exercise Elang AUSINDO has been hosted previously in Darwin in 2009 and 2013."
Every now and then there is a diplomatic spat between Indonesia & Australia - usually resolved quickly. Two very different countries getting along these days well mostly. Sure a few decades ago with East Timor there were problems - resolved. Then there is West Papua / New Guinea festering but nothing new for some time. Does that answer your question?
A4G Skyhawk: www.faaaa.asn.au/spazsinbad-a4g/ & www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/videos?view_as=subscriber