I have the Brigade ones as well and they work fine.
I have the regular type round boot laces as well?
Are you double clicking them once you have them adjusted?
I had a problem at first because when I squeezed them open with one hand and adjusted the lace with the other, they came loose too.

I found that after you adjust, you need to make sure the little locking tab is visible? That might require a double click depending on how thick your laces are?

I just checked them on my Teva water shoes to make sure.
If you pull real hard they'll move, but it takes considerable effort.
If they can withstand the rigors of combat, they should hold up on a canoe trip I would think.