jevents: the eventsbyyear is not updated with events after February 2020

Hello,

I am running JEvents v3.6.23. My "eventsperyear" list
https://www.lns.infn.it/en/events/show-events/eventsbyyear/2017/-.html
allows for "Following year" until 2020 and it lists only a few events of 2020.

It misses completely events starting from Feb 2020 to now, which are still present and can be displayed by giving manually:
https://www.lns.infn.it/en/events/show-events/eventsbyyear/2022/-.html

Yet, in this case there are "Preceding year" and "Following year" buttons.

I cannot find an appropriate setting here... What am I missing?

Sincerely,
Luciano