I was in the Nether, it was going well, until whither skeletons poped up, now I shot one, and it instantly crashed my client. I joined the server again, placed my cursor over the whither skeleton, crashed again. Spawn in, I then spawned over a lava lake (I was in a Nether fortress, not over lava) is this a bug or is it my game? ;-;
If you fall into the lava then it's you're client not spawning you on the right block. Its happened to me. I dont know why you crash with the Wither Skeletons