The game literally doesn’t have session drop-outs and abandonment punishments.
Usually this type of measure is meant to discourage player disconnecting during the session or abandoning it due to loosing or any other exploiting and abusive behavior in this sense.
Resolve:
the system or after action report screen should be longer in duration and should not let users exit it too fast or immediately after a session, regardless if is a disconnect, drop-out or after session screen. The screen needs to have a report, list of topics, as you select the user to give you multiple reasons of what the user is doing or did wrong. And the issue in cause should be at least there so others can report and confirm with the system/session if it registers a drop-out.
Edit: another alternative would be for the user to still have the list of session participants into their end of session screen that can be interacted with so that the reporting can be done by others. This should be possible even if the users are already gone, dropped-out or leave the after-acrion score screen. The screen can be closed via a push of a button, the “leave” button rendering not to hold the others under the same screen for the time mentioned above.
Even if disconnected somehow, due to different issues, the users must be able to see some sort of after-action report screen information to report others in case something is wrong with the host and if is the host who dropped.
The punishment can be a lock on the profile/account with a duration of several (1 to 3) minutes where the user should not be able to join/start or participate in a quick or custom match. Even if he is in a game party or not.
This issue resolve can weed out users that are trolling or even kids(especially) that have the habbit of disconnecting when dying, not even waiting to be respawned by reinforcements means.
ALSO AS A NOTE: Session disconnecting for AFK-ing should be put in place. As the user could be kicked after a two minutes due to inactivity and face the same consequences as the dropping ones.
This fix or implementation can also make it fair for the team members & hunters that are left behind. As it also affects by obstructing the opportunity and chances for trophy making on all sides aside ruining the overall session for everybody in it.