Had something odd happen for the second time. Wondering if anyone else has seen this.

All my bp will eat is live ASFs. At the last feeding a few weeks ago, she struck, constricted and somehow the rat got up and walked away. After that, she tried to just eat him, thinking she'd killed him already. I took the rat out and re-introduced them after a minute or so and she struck/killed/ate just fine.

Yesterday, I offered the first ASF and she took him no problem. The second one, she again tried to eat without striking/constricting when he was so obviously live. What's up with this?