I hope you are still recovering well. After about 20 years of using a splitter (Super Axe, an Australian machine 40 ton force, with bench top height table and hydraulic lift running off a Honda petrol engine) I recently found by accident that splitting a round, even containing a fork or knot, that the jump or sudden pop is avoided (most of the time) if you split from the root side of the round, that is from the bottom side downwards with the wedge entering the root side or surface. Big rounds 3 foot across by 18 to 24 or more inches high respond just as well and produce nice clean splits. I am going to check with a local (world) champion arborist and log splitter to see if this is how they do it manually. I have tried manual splitting using this rule, since this finding, and it certainly seems to apply though at 80 I am not that keen on giving up the hydraulic splitter.
To a professional woodsman this may be old news/information known by everyone, but I retired from office type city work to this style of living in the bush so was never taught the old ways.
I have found that wearing the logging helmet with a clear polycarbonate face mask, and/or mesh and ear muffs have saved alot of damage over the years, but painful finger splitting happens if you forget to keep hands clear!