Unary operators and implicit struct creation

The increment operator is not working correctly when I am attempting to assign an implicit structure to an array element. In the first section of the attached code, the variable "x" is never incremented when assigning an implicit structure to the array. However, in the second section of the attached code, the variable "x" increments correctly. The only difference between the two is that the first is trying to assign an implicitly created structure to an array element, and the second is assigning a scalar value to the array element. Is this a known defect and/or is there a way around this issue?

Thanks in advance.

Jon