“Hm, here works fine with this settings.”
Which settings?
“Probably you changed buddypress email template for unread messages?”
No, we have not changed anything, in buddypress or elsewhere.
It just started a few of your daily plug-in updates ago.
the “Messages” Tab on the user’s profile
screenshot:
https://www.dropbox.com/s/i4martsq3u2evn6/bp%20messages%20on%20profile.png?dl=0