Discourse has an hard limit for the number of users and groups that can be mentioned in a single post after which (I presume, I haven’t tried) the further users are not notified.
Ahem
爪ㄚ 丂丨丂ㄒ乇尺 ﾌ卂ᗪ乇 丨丂 卩尺乇Ꮆ几卂几ㄒ 卂Ꮆ卂丨几
Um, congratulations to your sister…? (does the text actually say "my sister is pregnant again" or am i just seeing a sentence where there is none…?)
I just typed that for crazyness sake. But Jade is actually pregnant again.