Heya, I’m not sure if this belongs in Tech Support or Bug section so feel free to move it. 
When I block someone manually, or the very occasional report for abusive chat, it will report the player is blocked, and it will show they are in my block list. But when I leave the game and log back on my block list will be empty. For some reason there is an error maintaining these people as blocked and as of right now I have zero people in my block list even if I do so manually.