Hmmmm…I’m not sure that’s the solution…do you see any cracks in the tube? Or a pocket of air?
I thought I saw what looked like one in your first tube picture up top, but the lower pictures look okay to me. It might have just been a reflection in the first picture.
Sorry that might have been unnecessary. 
As soon as support can take a look at your logs they might be able to see something. In the meantime, you can check the mirror to make sure it’s not damaged or there is any melting inside the head. Instructions for checking the mirror are shown below. Let them know if you see any damage. (And take a picture.) (Sorry).
Matter of fact, checking all the optical components probably isn’t a bad idea:
Anyway, hope that helps to eliminate some potential problem spots.