Can't add a field to a view - strange behavior

Hello

I am trying to update / create a view for the LEAD entity . For some reason , one of the fields (system field - companyName ) can't be added  - it is not on the list .

It is defined as searchable (should not affect it, but still..).

I can add it to the criteria section but not to the view or to use it on the advanced find .

Any idea what can be the reason?

Thanks,

Tali