Yesterday morning I canned 7 quarts of chicken soup. After it cooled, I noticed that four of the jars were still “bubbling”. Not like it was still boiling. But an occasional bubble would break the surface (I have a short video but apparently I can’t upload it on this form). The lids all seem to be properly sealed. I asked on the Alaska Harvesters Facebook page and people recommended I contact you folks. What would cause the content to bubble when it was cool to the touch? And are these jars still safe to eat? Thank you.