Dear Egbert, Dear Roger
Yes the data in any fields can corrupt the browsing of the authority list.
The freeze&error will happen as soon as the authority list encounters something out of the ordinary
So i am wrong, it can be any number of clicks until we reach something unusual in the authority list.
Example below for a co-author field # 701, it can be any other field.
^aAltora Colonna de Stigliano^bFerdinand-Joseph d'^cprince^f1871-1939 ^aAltora Colonna de Stigliano^bFerdinand-Joseph^cprince d'^f1871-1939
the issue freeze disappear when we edit the field to make it uniform as below.
^aAltora Colonna de Stigliano^bFerdinand-Joseph^cprince d'^f1871-1939