I don't see anything abnormal on those pics. What you see are indentations left from what looks like Velox rim tape, other than that?
If by "popping" you mean popping sounds during the inflation process then that's pretty norma; too, it's the tube seating itself inside the envelope.
Yes these look like indentations and there are repetitive circular ones too along the center. But would such indentations become permanent in the tube? The tube was used very briefly.
The popping I'm referring to is small bubbles forming in the tube (as in bubble-gum) then going "pop", hole in the tube. Happened twice already on this tube.
I noticed another bubble forming when I tried to inflate the tube outside of its envelope (tyre). What are your and other peoples' experiences with this? I was saving my latex tubes for a better day and ended not using them for years.