I was just riding a regular minecraft boat along, I rode it maybe 1000 blocks. I was wearing full god armor and had my god weapons and pick. When I get out of the boat for some unexplained reason I instantly died. Or almost instantly, I think half my health bar disappeared then the next half disappeared within half a second. I went back to try and get my stuff, it had despawned. The xp was still there so it definitely wasn’t taken by another player, though one was nearby enough to have kept the chunks loaded. I had been holding my sprint key while riding my boat, though I’m not sure if that actually makes it faster. The death message just said “Cutout failed to stay alive”

EDIT: I was holding my sprint key not my shift key