Takes very little, relatively, to get through an area that wasn’t insulated properly. So there was probably a path for it to ‘get out’…
I would remove the insulation and re-apply it. My assumption is that it’s an insulating compound that was put on the tube.
I’d also wait for a few more opinions before jumping to any action.
Keep in mind that it really hurts to get bit by these things. So take precautions. Generally the best is to let it sit for a few hours or even overnight.
I will sometimes ‘run’ my code to see what the machines going to do. I’ve noticed that the lps can be off for an hour or more and when I do a run, with the lps still off, it will fire at the start. So there is little to drain off the charge.
I’ve learned to ground my tools to ensure it’s got a better path home than through me.
At least until I know I’ve made a connection with the hv and it’s safe.
Good luck, take care