Just a bit information, our postal service was/is having backlog because of barcode sticker issue that’s still on the process of updating to the new one. So sacks of postcards and mails were stucked, waiting for new barcode stickers
I haven’t received any card in 2 months 
, but some of Indonesian postcrossers start to receive their cards gradually (with the new barcode)
So yep, in general at least for now the mails to Indonesia are expected to be slower (the service is slow most of the time too anyways lol). My cards always came in batches before, I registered them all on the same day. This pattern may make some postcrossers speculate that I wait to register the cards but in my case, the service is just slow 