Completed the spider mission when it came out like a week ago.  I noticed that those spider girls dont let go of you if they get you.  You lose the first bar of energy but it doesn't let you get away and they just take you back down for round 2 and 3.  Is this deliberate?

This is not intentional.  I'll look into it and try to have it fixed for the next update.  Thanks for letting me know!