What's causing this puncture? This puncture is on the inside face of the tube. One day I got a big piece of glass in my tire. I patched it up and then I got a puncture on the inside face of the tube. I patched that and then I got another puncture on the inside within a few blocks. I patched that and then I got a third puncture on the inside within another few blocks. The punctures are not in the same place so I'm pretty sure the rim is not the issue. Do I have a piece of glass inside the tube, rolling around and puncturing in random places? Why are the holes only on the inside face of the tube? Will any new tube fall to the same fate?
It looks like a glass cut to me.

It is common for glass to lurk in the tire case, so this is unusual.

Take the tire and tube off completely and inspect the inside of the rim and the tire carefully. If you can't see anything, run your fingers around the rim and the tire.

If you still haven't found anything, take the rim tape off and check it and the rim again.

If you still haven't found anything, reassemble, sigh deeply, and hope for the best.