Specified cast is invalid with LINQ provider

I am running into a very hard to reproduce issue related to the LINQ provider. The class and table looks like the following:

[Table( "user" )]
public class User
{
[PartitionKey]
[Column( "user_id" )]
public string UserId { get; set; }

[Column( "certificate" )]
public string Certificate { get; set; }

[Column( "container" )]
public string Container { get; set; }

[Column( "password" )]
public string Password { get; set; }

[Column( "salt" )]
public string Salt { get; set; }

[Column( "update_timestamp" )]
public DateTimeOffset UpdateTimestamp { get; set; }

[Column( "user_attributes" )]
public Dictionary<string, string> UserAttributes { get; set; }
}

The query:

User user = Users.Where( x => x.UserId == userId.ToLower() ).Execute().FirstOrDefault();

The exception being thrown randomly is:

"ClassName": "System.InvalidCastException"
"Message": "Specified cast is not valid.",
"StackTraceString": " at Cassandra.Row.GetValue[T](Int32 index)\r\n at lambda_method(Closure , Row )\r\n at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()\r\n at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)...

The problem it seems is that sometimes the column order doesn't match the row data and the cast fails - in this case it's trying to convert a DateTime to String. The table in Cassandra matches the definition above and the only wierd thing is that one of the columns (certificate) was added later after the table was created.

Like I said, this is very hard to reproduce and I have tons of code very similar to this that has no issues.