Field appears empty with many2one widget in form view

[Animal-Machine]

In form view, when I use the many2one widget on a Many2oneReference or Integer field, I can choose the right records but once I selected one, it appears empty. In tree view without the widget, I can see an integer, so the field is not empty but its value is not displayed with the widget.

[Animal-Machine]

I work with the 14.0 version of generic_m2o module.

[Animal-Machine]

I just noticed that when I go back to the form view after clicking "Save", the selected record now appears. But after that, if I select another one, the first record selected remains displayed instead. It doesn't change even after closing the window then going back on form view again. Once again, it's only a display problem, the real field value is updated… still very annoying.