The events contain tag "t" with "B" as hashtag i.e. https://rmj.npub.pro/post/note1qgs73msf9mlflgg6uaywzjdz9snexqz944zty87tnvkhdj8c750s8k76fm/

So it's the app you published with that added B as hashtag. That note has "client"="Coracle" - @hodlbod maybe Coracle doesn't parse hashtags with accents properly?

Notes published with some other client seem fine: https://rmj.npub.pro/post/note1xm7tm2nzjpzmcddj4e0nd7j86h9ggwrckmq4cr7zk3s0lc2rle9qsj7wlg/ 

 You are absolutely correct! I recall that I notified @hodlbod about this problem in Coracle some time back. My bad. Sorry to cause you work delving into this. I'll crawl back in my little corner. :) 

 That's ok, bugs are bugs, please keep reporting, thank you! 

 I don't remember that, I'll take another look. As a 'merican programmer I don't usually step outside the confines of ascii 😂 

 Yeah, I can see how that would narrow things -- and facilitate too!