Post Game TFT screen not showing up

so when i watch stream or talk to other people, they get a post game screen after a match. I have yet to see one and I have left early, stayed to finish watching, and even have won games. After the TFT game finishes I get a loading screen but it takes me right back to the main league client screen for the arcade event. Why am I not getting a post game screen like others? this is NA btw
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