I just picked up my science officer and she has a shield heal. It is not a regenerate over time, it is just a straight heal. I thought this would be a nice addition, however I noticed that after the first use, my heal stopped working. I click the button, cool down timer starts, but the shields didn't increase. Wondering if anyone else has this issue?
I recall an issue a while ago where some people were having engineering team fix enemies that were targeted rather than themselves.
Try not selecting a target and using it while out of combat. Do you see the giant science team icon over your ship when this happens? It'll look like a giant blue circle with the medical staff and cross in the center and your shield indicators will glow (unless you have bloom turned off).