Hi Michel,

i just retried my example and yes it does keep the name so its not as reproducible as i thought.
But if i select the unnamed face first and join it then it is named "box" which is still wrong.

I've noticed this issue some time ago but if no one else has it then its probably something wrong with my setup.
I'll look into it some more when i have a chance and I'll let you know.

Dinos