Exactly! Which is why I called. I do prime the pens before the first use so it was concerning that there was a very large bubble and more small ones that appeared mid pen and wouldn’t go away with tapping. It looked like a swag pen you’d get at a convention the bubble was so large. They did disappear after releasing the dose into the air, twice. I check now carefully before every injection for bubbles. I should add, the pen was in the same place and no travel or temp change or any external causation. Radius rep didn’t seem as concerned as I was and I was comforted that I have 6 extra doses incase bubbles appear again - which they did another time.