All UI disappears

I was playing in my survival world, and after fighting a drowned, all UI disappeared. The hotbar, the crosshair, the hearts, hunger and experience. I think my sword broke while/after fighting the drowned, and that may have caused it, but I have no way of telling if this is the actual cause. I don’t know how you would go about reproducing it. I was playing on an iPad 8th Gen running iOS 17 with an external keyboard and mouse. I have closed and opened Minecraft, this didn’t help. The screenshots are not cropped.