Anyone Use The Mustad Fastach Clip Instead Of A Snap Or Swivel Snap?

I was fishing a Ragetail Toad on a Cabelas Tournament ZX Topwater Frog rod with 30lbs. Power Pro and a 33lbs. Cabelas premium swivel snap. I had just caught a 1lbs. bass on the drop/sink (I caught a few more fish on the Ragetail Toad and all of them were on the sink that day, none bit on the retrieve) and cast underneath this dock and let it sink. I felt a bite, reeled up the slack and had a pretty good hookset. When I set the hook line was pulled out from the spool. I reeled in some line and thought I was moving the fish and reeled up again as I pulled the rod up and there was a slight disturbance of the water. Not a huge splash, just like something big had moved just beneath the surface. I reeled in two cranks as I pulled the rod back and pop, the line snapped. Or so I thought. I reeled in the slack and found this, a broken O-ring. I've never had this happen before. I've had the snap part wear out and open up but never an O-ring on a swivel snap actually break.

I assumed the fish was a big bass but perhaps it was a big musky or northern. This lake is known for having both. It broke the snap with no effort. Like it just whipped it's tail and was gone.

What the swivel snap looked like:

The broken O-ring:

Here's the dock it was under. Probably about 2'-3' feet deep:

I have no clue what it was, it would have been nice to see it. I can't believe it broke that 33lbs. ring so easily. I'd say the biggest a bass could get in this lake would be 5lbs at the most. Do you think a 5lbs bass could do this?

Has anyone else ever had a swivel snap fail like that?

That led me into looking for a new fast attachment method since I change lures often. This Mustad Fastach Clip looks promising. So, I was wondering if anyone has any experience with these?

I looked at the Norman Speed Clips but saw that some people say they aren't good and open sometimes.