As it looks, this bug is cryogenic in deep Universe.
If augment(Re(z),Im(z)) is not rounded, the project is killed.
If transited through file and U-nested it recovers.
The transit through file has the virtue of clearing the bug.
Much professional is: vectorize/round in the module.

Small Number(s).sm (14,6 KiB) scaricato 1411 volta(e).