Reality 101 failure
The program (or more likely feature of a program) does exactly what was asked for, but when it’s deployed it turns out that the problem was misunderstood and the program is basically useless.

Heisenbug
It is an error, which disappears or alters when it is attempted to be identified by analogy to Heisenberg uncertainty principle in quantum physics.

Protoduction
This is a prototype that ends up in production