Cursed Crosser

I recieved the 1.16.200 update and attemped to join my favorite server NetherGames, I use the Chr7st 16x Utopia texture pack and Astral Client. When I tried to join it worked but there was an odd black box around the crosser, I do not know why this is but whenever I loaded up the game it said that I needed to update my graphics card so I do belive that it has something to do with that. Thanks and keep up the good work!