CloneTone, I just noticed your first picture above when you said you should have left well enough alone. Mine looks a lot like that, slightly bigger wedge shaped bubble, but exact same shape and same spot. I don’t think it’s worth the hassle or risk for me trying to replace or fix it.
Just installed mine. There’s a pizza slice-shaped bubble on the lower left corner of mine I can’t get out. Kinda annoying but I’ll probably leave well enough alone. Hopefully it will remind me of pizza and not a bubble.