If I'm seeing the pics clearly, it looks like some serious valve float going on there. That's why I asked about the pics, because adding lash caps always makes the geometry worse with roller rocker. The engine doesn't know or care where the pattern is on the valve tip, but it certainly knows when the valvetrain is unstable. I'd investigate further, especially geometry, so you don't have damage more serious than just a lash cap. I hate to see stuff get busted up when it can be avoided.