I think the "Visits Over Time" chart does not calculate the correct number for today:
The chart also does not update the numbers when I visit the Visitors:Overview section
The chart does not give a information that the calculation could be out of date. So I expect that this are the real time data.
HTML export of this chart:
correct amount of visits
numbers looks not correct
set filter "day" from yesterday and today
fyi @mathContao also note that these reports are updated only every few hours so you might not have seen the latest data yet and comparing the two numbers would only work around midnight because the number of visits/visitors in the last 24 hours might be different to the numbers during the day in the site's timezone.
As @diosmosis mentioned if you have more questions around this be great to contact support.
Ok, thanks for information. Please let us discuss some points:
1) I use Matomo on-prem and matomo.cloud. For me as a user I expect same/similar experience on both. On-prem the stats "Visits over time" is calculated with the newest numbers.
2) for me it is fine that not all stats are calculated with the newest numbers, but I expect an information about the age of stats. For exmple the "pages" stats has an age information, where I see how old are the numbers. Most stats have this information behind the (?) icon