Haunted Block (Build a boat for treasure)

I was playing build a boat for treasure with my friend. When I came to my friend's area, I arced a purple block and I thought it was a bug. Nothing happened when I touched this block, but when we went to the sea, my game was very tight, I was finally kicked out of the game. I couldn't get into the game for a few minutes. Finally, I was able to enter the game, but the game was too tight and I was kicked out again. When my friend went to sea again while I was away, the screen started to glitch purple. Eventually the screen went completely purple and I swear by all of that. And i can't upload photo because the photos are overrun 10 MB's.