It seems a different, although related problem as my another long-standing one, although maybe it were more efficient if they were fixed in the same sprint. Please don't sign this question as duplicate, they aren't.
There is also a very similar bug from 2011. I also don't think they were related, during this 3 years probably not too many part of the SE engine left unchanged.
Maybe it is related to the significant number of my 200+ SE accounts, but I must also mention, there is at least one SE user having more as twice as me.
I suspect here a bug.
P.s. I suggest a better fix as last time (somebody quickly upvoted me somewhere...)
P.s.2. Finally it appeared, but it took around 2 days.