Ok i attempted to recreate the bug and boi did that take time.
For the annie level go to the spot where there are 2 zombies and a Quadra-puss and eliminate one zombie. Try get the zombie to insta grab and Quadra to attack at the same time. (This took too long to be a recurring bug, no idea how I managed it the other times) Only zombie level yes.
For Hailey, any level with a insta grabber next to a regular enemy. (I used the spider and snowman) took too long and almost gave up.
I can say that it shouldn't really be an issue after trying to attempt the Bug on purpose.
for the blaster/jetpack phase. I don't know how it happened. It was level one for Annie's expedition, I was hit by a bat and blown by the wind while trying to get the cacoon. The pack just disappeared through a wall. Can't get it to happen again.
Hope this was helpful.