problem in viewport not display mesh.

[houou]

This happened again, this time in another computer with another user and another scene.
Now I have a file that is broken but due to NDA i cant publish here, if you give me a mail I can send it there.

This time :
Intel i7 7820
MSI 1070ti
64gb ram
windows 10pro updated.
tyflow last build.
max 2020

but the broken file opens wrong in other computers too.