Yes, WhatsApp does acknowledge that their system was problematic. It happened around 02:00 pm Sunday (03/23/2014).
"Sorry, we're currently experiencing server problems, and hopefully this can be resolved quickly," chirping WhatsApp official account on Twitter.
Even so, without naming specific issues referred to the service WhatsApp has now gradually recovered in various countries, including in Indonesia, which previously also reported affected.
"WhatsApp service is back to normal, we apologize for the previous problem," wrote WhatsApp, two hours after the first chirp.
