Why I do not display all the players within the participants section of an event?
This article showcses why, accessing an event (training, game, or any event) I do not display the right list of players in the participants section.
When I access an event and I do not display in the participants list all the players included in Players - My team (and then added to the current season), probabily it's because the selected event has been created BEFORE the season was created or BEFORE specific players were added into the current season.
To fix the issue you just need to create a new event and check if the participants list is correct. If that's the case, you can use this new event and delete the past one.