Trouble with case sensitive completion

When wanting to insert a mixed case variable such as "myLongVariable" in PhpStorm, I might start typing "mylo..." and the suggestion list correctly finds "myLongVariable". If I click on that variable or select it with my keyboard from the suggestion list, PhpStorm will insert "mylongvariable". This is frustrating. I have tried the 3 'case sensitive completion" variations in Editor->General->Code Completion but this behavior remains. Any help or explanation on this issue would be greatly appreciated.