NVM I just returned to a previous save state and was able to recreate the issue.
It just comes down to trying to find Rudolph after already bringing his body to the altar. It triggers the same cutscene we saw before (definitely an unintended bug). Before triggering this bug, the help text on the items menu talks about bringing him back to life, and talking to Carol triggers the cutscene where she gives you the blood. After the bug, it changes the text to "we have everything we need", and talking to Carol triggers the "girls night" dialogue and it's impossible to collect the blood.
Hope this helps!