If those are Pinball Life white rubbers, might be the reason. These are of lesser durability and quality than other brands. Also, white in general is less durable than black.
For flippers, always standard rubber for me, no super bands. Titan is ok, but still not like good old standard rubber. And if I'm being picky, always red flipper rubber, allows me to see dirt buildup and bouncier than black. Plus, I like how it looks with most games.