Welcome
I've been playing around with onw of my well known UBEs and I can't break it like you no matter what I do. Change the LVL BK field, change sequence, untick things. All still works
I even made my LVL BK conditional like you (not sure why you've done that) and I could still see them.
If there's not to much code, humour me and recreate another LVL BK section and see