You likely correct for bone broth. The bones have to become soft and rubbery which usually take about an hour in the instant pot at high pressure.I just looked up the time... 25 minutes at 11 pounds of pressure... really? I was going to guess it would be more like 45-60.
Also, I got a new canner with a weighted gauge, so it's going to be 15 pounds. I have my choice of 5, 10, or 15.