That I'm not sure. This has nothing to do with Nostr specifically, Unicode is a much older and broadly used thing. nostr:nprofile1qqs2jwlflvpwgmzqga4gfatfwhd4sd0latv33lajh5pzjpyed5lacrqpr4mhxue69uhkummnw3ez6vp39eukz6mfdphkumn99e3k7mf0qywhwumn8ghj7mn0wd68ytfsxgh8jcttd95x7mnwv5hxxmmd9uq32amnwvaz7tmjv4kxz7fwv3sk6atn9e5k7tcnq0l4y would be better able to figure out what's happening.