Lookup fields not update when edit

Lookup fields not update when edit

I do not know why, but right now when I edit the field called "Equipo" ( team) in form "EQUIPOS" ( teams) which is a lookup field in the form "PILOTOS" ( drivers), it is not updated! 

This is a basic functionality that should be fixed.

I give edit access to support to see if you are kind enough to solve it (application called CGC).

Thank you very much