I would carefully check your inner shift wires for broken or frayed strands whenever there is a sudden change in shift behavior. Check everywhere the wire enters or exits its housings for worn places, including at/inside the levers and derailleur.

I do not have experience with the new SRAM stuff, but having the wire break off in a Shimano brifter will put you in a world of hurt, it is MUCH better to find and fix it before it breaks than after. Getting the broken end out is exquisite torture.