The formatting of the bot's posts are messed up. Add a new line after the link. Links are not even working on there, 404 all, the number of the next line are added to the end of the url.
Some clients can convert the user handles to link, but the default webui can't, but you can work it around and make it an instance independent link this way:
[@hatnix@social.tchncs.de](/u/hatnix@social.tchncs.de)
Rendered: @hatnix@social.tchncs.de