minecraft huunger games

i was playing mincraft hunger games with the server sg.lbsg.net it was working fine untill somethimg happend.my screen was in front of a brick my
charactar was in front of a brick when the game startde so i tried to get out i dindt let me.i left the server and joined again same thing again.so i reset my tablet and then downloaded mincraft put the server.i joined it then i was able to get out of the brick it turned out i was in a massive square.there was about 2 more players inside the square we were stuck on the starting podium.can u help me to fix the bug