Stiff rodtips definitely increase the rate at which fish get off. Less give for the headshakes and sudden pulls. So more pressure changes between hook and mouth, leading to hooks pulling out and, if the fish is sizable, snapped tippets.
Whether that is your problem, or if you're just in a slump (hey, it happens), I don't know.
But to combat it, the best equipment thing I know of is to increase the amount of stretch in the leader and tippet. Stay away from flouro's and braded materials, which don't stretch. Stick with mono's. Even then the stretch varies a lot by brand, but you can test with the hand pull method. The extra stretch acts just like a softer rod to absorb those things.
Back when I was fishing steelhead more, I found this to be a lifesaver. I went through a streak where I was almost immediately losing or breaking off everything I hooked. And even then I stuck with flouro tippet on the business end for the abrasion resistance on those teeth, but up on the leader, I put on extremely stretchy stuff. It was like night and day, the line absorbed all the surges and headshakes, hardely even felt it in the rod!
Other than that, it's adjusting technique. Adjusting your hookset, keeping proper angles during the fight, etc. That's good advice for any rod, but perhaps with your new one you gotta pay more attention to it now than you did before.
