They work in the real world due to the inherent reverse breakdown voltage of the transistors reversed Base , Emitter
In LTSpice the reverse breakdown is not normally modelled.
There has been a recent Thread advising how to add this reverse breakdown,,, Search for the LTS thread
Did you mean the LT SPICE algorithm has an bug on this? I just recommended it to one of my the customer. Because I saw so many guys on this forum use it.