Cube Render Target "Size X" Is Being Set as Y

The cube render target "Size X" is being set as Y. 

Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4234136

1. Open the editor
2. Create cube render target
3. Open the render target and set Size X to 1024
4. Save the render target and export it
5. Open the HDR file and view the dimentions

Results:
The file size will be 2048x1024

Expected:
The file size should be 1024x512