BUG: Unique Visitors are displayed wrongly since Piwik 3.0.0

Hello dear people of the internet and a merry Christmas!

I found a Bug that I’m facing since Piwik 3.0.0 update.
When I view the data for a custom timespan then it displays for “unique visitors” only the first digit of the number, e.g. example 4 instead of 4123.
This problem doesn’t occure when I only view the data for a single day or a week. It only happens with custom timespans.

Best regards and happy holidays,

Hello Philipp, please can you createa a ticket in our tracker here: Issues · piwik/piwik · GitHub and post a screenshot showing the issue?

Similar issue here. But since Piwik 3.0.1 only when I switch the period to year. Then there are 0 unique visitors. All other time spans look fine.

Found the solution myself: https://piwik.org/faq/how-to/faq_113/