Data yesterday zero

[BeBe]

On the first day of the new month, the dates of "yesterday" are zero

Schermafbeelding 2017-12-01 om 07.15.02.jpg (242.1 KiB) Viewed 2315 times

[admin]

This seems to be a bug hidden somewhere. As it occurs just one day a month it is hard to debug.
Hopefully, it is just on the "live data" tab and not with the template variables used for uploads.

[aeng2]

This month i had the same problem. All data from yesterday are zero.
I also upload some data to my website, and [thb0seapress-ydmax.1:---] was the whole day empty.