If I remember correctly, I read it somewhere in UU, it says 2 years, and the officer also says 2 years. Try google “Perhukumham no. 43 Tahun 2015, Article / Pasal 53 Verse / Ayat 2”. Probably this one. Or unless they revised it or annulled it it should be still in effect. But you know the govt keep changing the laws, can’t keep up with it.You sure that's 2 years? It was five last time I read the UU, unless I've forgotten. Has been a couple of years.
Given that spouse-sponsored has its own challenges, but I’m kind of envy you guys, your KITAS/KITAP appears more secure and more straight forward than the ex Wni one. Less room for the officers to have their own interpretations (less bs / random local rules for applying).