I know, that many of us are using this bug, but I believe that its still a bug.
My issue is, that we can check whether deer are being killed or alive, even without vision there. I think that if you have no vision on the particular area you should not be able to select alive deer. You can check the area with any unit and you will be able to verify it …
Thanks.
P.S. I didn’t check whether it was discussed somewhere, so sorry if it is the case.