Fan Blades are designed not to flex forward enough to make a difference. They of course do flex/untwist all of which is accounted for in performance.
If you are picking up bent blade tips than it would be spinner ice at taxi conditions which is supposed to be shed by timely spoolups during taxi before it gets big enough to cause damage. Check your other cold weather operators
Ice sheds on fan blades causes damage behind the fan in the outer casing and not to fan blades