Hello,
Apparently, there has been a problem for quite some time in the settings of the UDP telemetry and the PS5, which means that players in question cannot connect to the lobby when they are active and/or fly out of the game after entering the session.
The bug is caused by the following settings:
UDP telemetry - One
UDP transmission mode - One
Share your telemetry - Yes
View your own online ID - Yes
Please check and fix this phenomenon, otherwise it will not be possible for some leagues to work with their own apps such as SIMHUB