Android’s NFC support and associated libraries are kinda like sand… you build a house on it, and it’s gonna shift. I’ve seen a recent spate of odd issues like this. Get TagInfo from NXP and do a full scan, then share that data here. My hunch is that there are two NDEF messages on the chip… a blank one, then one with your vCard. Unfortunately software engineers suck so hard sometimes… nobody follows NFC spec… hell they don’t even follow ISO spec on the RF protocol side… so yeah, putting two NDEF messages on a tag, which is totally within spec, is handled like dog shit by everyone… but I digress… happy Monday.