Unreliable complex calculation in CAS? Bug?

[Dands]

Hello,

Please follow my steps and let me know if I did anything wrong or if there's really a bug here. The same calculation in Home gave me the expected result.

I am using the matrix "MA" in terms of "a" to find the symmetrical components of a current vector as follows:



First I declare my variables. "a" is the phasor 1∠120°


Here's MA times the vector from the example above.


Now I copy and bring this result in rectangular form to Home since CAS is unfortunately not able to change it to polar (frustrating). As you can see, the third value is completely off.


And here is the same calculation when executed completely in Home, providing the expected (approximate) result:


Any ideas?

Thanks