The latest analysis of this issue comes from a really interesting article at International Idea written by
Adhy Aman:

Indonesians, particularly those living overseas like me, were astonished on Thursday, 11 April 2019, by the discovery of pre-marked ballots in the outskirts of Kuala Lumpur, Malaysia. As per the new normal of how scandals break out in this technological age, it was first revealed by two videos on social media.

One video shows the discovery of what looked like thousands of pre-marked ballots found inside large plastic bags in an empty warehouse. The other video shows two women gently opening envelopes, taking folded ballots out of them, marking them and putting them back into their envelopes; not forgetting to reseal the envelopes with glue, of course. At least one man is also seen tampering, therefore by no means only women were involved in this scandal.

The General Elections Supervisory Commission of the Republic of Indonesia (Bawaslu) has confirmed the existence of the scandal and alongside the General Elections Commission (KPU), they are now investigating. Today, five days on, investigations have been impeded by the fact that the location and evidence connected to the alleged fraud are in the hands of the Malaysian Police. International IDEA’s Voting From Abroad Handbook, stated that the host country to out-of-country voting, in this case, Malaysia, “can help by guaranteeing certain safeguards to protect against fraud. The host country may be able to provide invaluable assistance in this regard, particularly in terms of sharing data.” It looks like Malaysia can help by letting the Indonesian electoral fraud investigators gain access to the evidence and to any other data they have gathered.

See full story here.