From 2020, the rule about how many races were counted changed from 4 to 3. So it is the best 3 results that count and bonus points are added for each race over 3. This has been correctly stated in the Race rules and repeated on the Web site description of the World Cup.
Unfortunately, this was not updated on the tables of World Cup points, which may have caused some confusion. This will be corrected in the next version of the tables which will include the results from Bergsee Ratscher.