FYI the below happened due to a Ui glitch on Nostur for that post 

SaidRkinoxPretty

I wanted to notify arkinox the moment I hit at. I lost edit ability to the post. I good preview and saw it tagged him moment I typed “A” but I could preview or edit. I could not return to type. I thought funny if it took his name from just A so I tried to type more of his name. It must have dropped that after the first word. Didn’t see any way out but to post or cancel. So I thought I’d see what I got if I posted. That was it.  

 Rugged! 😂

If you ever have tagging problems on a client just look up their full npub on nostr.band and paste it in after the @ symbol.

Nostur definitely still has a buggy editor. Document and post your issues here. @Fabian ships updates constantly.

https://github.com/nostur-com/nostur-ios-public