Sharepoint library - Lookup stopped working just on one column
I have a library with lookup columns pointing to specific lists (providers, companies, products etc.). In particular, I have two columns, "Company" and "Invoicee" pointing to the same list "companies". Everything worked perfectly for months, but suddenly since yesterday the lookup for the "Invoicee" columns stopped working. When I start typing, it seems that it starts looking for a match but it keeps looping forever. The other column "Company" that points to the same lookup list does not present the same problem and is still working properly. I thought it could be a temporary issue but today the problem is still there. Any idea on how to fix this?