Contract(real_QN, complex_QN) fails with "not support type with dtype=3", but Contract(complex_QN, real_QN) succeeds

[chiamin]

Environment: cytnx 1.0.0, Python 3.9

I believe this is a bug.

Contracting a real BlockUniTensor (QN) with a complex one raises an error, but the reverse order succeeds.

Expected behavior: Both Contract(real, complex) and Contract(complex, real) should succeed (or both should fail), regardless of argument order.

I attached an example code.

QN_complex_real_contract.py