I am shocked that Indonesian on this forum generally think poorly of industrial cooporation with Korea over naval projects. Not only Indonesia's PT PAL assembled its first locally-built submarine with transfer of techology from Korea, but also still receives technical support from Hanwha Ocean and Shipbuilding Industry of Indonesia as a whole imports critical equipment and materials for shipbuilding from Korea. Defense Minister of Indoensia, Prabowo who is I believe a presidential candidate even attended a ship delivery ceremony of Alugoro-405 and President Jokowi emphasized the importance of cooperation between Korea and Indonesia over submarine projects. Hanwha Ocean, back then Korea & DSME have received no major complaint over workmanship done by DSME from Indonesia.
I am not sure why Indonesian think they have been wronged by Korea. In fact, Korea & Hanwha Ocean have been very patient with Indonesia which hasn't executed the order for additional 3 submarine from Hanwha Ocean for almost 6 years now and Korea & Hanwha Ocean could have very much asked for a contract cancellation fee from Indonesia.
I guess Indonesian might have their own reason, but it doesn't seem like it is rational.