@crablante
Top water is right Mr bare is full of amazing advice!.
So now I will put my tin hat on!!!.
Your knots are fabulous but fkin big.
Sometimes it's not about what's right and technically perfect it's about what works and getting the job done simply.
You need to get that knot size down to avoid the problem.
Try a four turn grinner on the nylon to a six turn grinner on the braid and tighten it up carefully with loads of spit.
Pull on it as hard as you can, if it snaps go again until you get a good one.
The knot is tiny.
Sure it's not 100% efficient but that leader knot is going to be on the spool when you have a fish at your feet.
You rod no matter how powerful will not be able to put more than 8lb onto that knot so manage the situation accordingly.
It's not an ideal solution and I am 100% suggesting you compromise the strength of the knot but I do use exactly this knot on Chesil to help avoid crack offs.
What I think happens is the braid bites into the nylon so hard that that's where the strength is....
Try it and see what you think I doubt you will break it and if you can't then it's got to be good to go IMO.
Right I have made my confession and am ready for the backlash.