MC43 HS + LS Digital Out

We are using a Digital Out HS + LS and noticed that if the output is True and we disconnect the function, it does NOT report it as an "Open Load".  If the output is False and we disconnect the function, it does report it as an "Open Load".  We have tried this with the "DOUT Under Current Detection" set to Yes and No with same results.  This also occurs with the Digital Out LS, but not Digital Out HS.  Is this a possible bug?