A gradual rise can invite needless acceleration, so effort should stay steady when the road looks flat. It is easy to mistake a deceptive gradient for a level stretch and instinctively push harder to maintain a perceived speed, only to find the legs screaming when the slope actually steepens.
Visual cues are often unreliable. Relying on a screen or a specific wattage target can be just as problematic if it ignores the reality of the road and the creeping effect of fatigue. The goal is efficient climbing, not chasing a number while the terrain changes.
Do you rely on a specific power target for these sections, or do you use a more effort-based approach to pace your climbs?