Excel VBA - ComboBox上的筛选器无法识别第一个值

I have a userform set up which contains a ComboBox. The ComboBox is populated with values which are pulled from a range of cells which have been defined in the Name Manager (range of A1:A5 stored in a separate sheet.) The default caption for ComboBox is "Select Office"I have a userform set up which contains a Combo