I'm playing OpenXCom / UFO/EU with UFO Redux installed and I'm using the latest nightly build (openxcom_git_master_2016_05_11_1842.zip). The past ~16 nightly builds already had this issue - I don't know about before because I only discovered OpenXCom recently when GOG put UFO on sale.
I have several bases with Alien Containment and each has multiple live aliens. When I bring up the research screen, I don't get any of the live aliens as research options. I don't know if this is a bug in OpenXCom or if it's caused by UFO Redux - is this a known issue? If necessary, I can provide a saved game that shows the problem.
If I remember right, in the original (DOS) UFO, all live aliens could be researched, as many times as they were captured.