This is definitely the first time I noticed that happening since I set up this account a few months ago.
I think it was the first time I tried to link in a pm. At first I thought I made a mistake and tried to resend, but the wrong automatic title happened again.
I didn't want to bother this person I was trying to send the pm to, but I was annoyed, so I sent the link to somebody I know better here and it worked fine with no mistakes (the site put in the correct thread title).
I don't think that I've used links too often in my messages on the schools board yet, but I'll keep an eye on how they are working when/if I do.