one revenue is missing in reports

Hi,

In the beginnig of 2021 I added a revenue for the date of the 31/12/2020.
This revenue is now missing in every report, but the dashboard considers it.
So the dashboard displays a loss of 343,99€ and the profit and loss a loss of 405,05€ (the laster is correct).
I already tried the "clear cache" button.
I also tried to do other modifications for the last year, they are also ignored.
Is there any manipulation to update thos reports or is this a bug?
It's a self hosted instance version 2.0.26

Many thanks in advance.
Georges

I investigated a little bit futher.
All transactions dated on the 31th december are ignored in all reports. The beginnign of the financial year is set to the 1st january.