The link doesn't prove exactly that the spell should be affected by BF, however if it should.
Be like, 500k HP, 10% heals each debuff/effect removed for your max HP, which is 50k. Can't go heal over 50% of your max HP, meaning the heal received cannot go over 50% of your HP, and not that the % can't go over 50% Which few players misunderstood.
So. 60% of 50k is 30000. So it should just heal 20k up to max of 50% of your HP.
I'm actually really interested how much it heals each debuff removed, could you take screenshots of that?