I have a text column with some validation
This column is bound to a list/content type.
One of the other columns in the list is a multi select lookup column. The values for the multi select column are sourced from another list.
Finally a third column is set to validate for unique entries per row
All columns are set up to be required
If the user enters a duplicate value in the unique column the values in the multi select column disappear. Basically any validation that requires postback clears the multi select column
Any tips would be much appreciated