Odd burned disc configuration?

I bought a film and it turned out to be a burned disc rather than a pressed disc. It turned out to be an odd setup and it cannot be seen on a burner but it can be seen on a player and a ROM drive. CDSpeed shows that the disc was burned on an NEC 3540, and is Prodisc F01. When I look at it through a burner it says the session is open, on a ROM the session is closed.

I have no problems with the disc, but I am curious as to why it is not seen by a burner.

Any ideas?

I don’t think a burner will recognize a burned disc unless it is finalized.

I always thought it was ROM drives that had that problem.