Vietnam eVisa Duplicate Application — What Happens, How Long the Hold Lasts, How to Fix It

Submitting a second application when the first one stalls feels like the obvious move — it isn't. Both files freeze for up to 48 hours, the original error is still there when the hold lifts, and the government fee on the cancelled application doesn't come back. What the hold actually does, what to send via WhatsApp, and how to get on the flight anyway if it's today.