CAS : strange error on simplify

[roadrunner]

I typed your equation into the emulator:

(−√(2+√(2))+i*√(2-(√(2))))^2

and hit enter. The result is on the second level of the stack in the attachment below.

Then I hit simplify. That result is incorrectly displayed on the first level of the stack in the attachment.

Then I clicked on the answer on the first level and hit enter to copy the answer into the command line. The correct answer appeared!

   

It appears the answer in memory is correct, but it is displayed incorrectly on the stack.

road