After entering a comma, an inappropriate autocomplete suggestion window displays

When I am typing in the query shell, many times when I hit a comma, a suggestion window containing:

• constructor
• toString
• toLocalString
• etc....

Is displayed, with 'constructor' highlighted. The problem is that most of the time I hit a comma, I want to hit enter to go to the next row and continue my list of fields. But because the 'constructor' is highlighted, hitting enter always selects it, making a very unnatural and inconvenient editing environment. Particular because I'm can't even thing of a scenario when a comma would ever be followed by 'constructor' or 'toString'. A period perhaps, but not a comma.