If you read the prescriber's insert (the stuff in the tiny type) for BCPs, you'll find a line that says "affects carbohydrate metabolism." The plain-English translation is "some women will be hungry all the time."
From the biological perspective, it's the same mechanism that makes some women crave carbs during the PMS time frame.
You may find that your body adjusts after a while, or it may not. Eating more vegetables/fiber and less sugar/refined flours can sometimes help.
----
The following isn't much more than "slightly informed guesses," so don't take it as the final word on this subject, but "if the shoe fits..."
(1) Women who have PCOS (polycystic ovary syndrome) are more likely to see this side effect.
PCOS women often have irregular periods [which BCPs temporarily mask, but do not "cure"], male-pattern hair [a little bit of a mustache, a little hair on their breasts, that sort of thing], and trouble losing weight.
(2) Women who have blood sugar problems (high OR low) or who are at high risk for type 2 diabetes are more likely to see this side effect.
You are high risk for diabetes if you are overweight (particularly if it's "tummy fat" instead of "thigh fat"), have family members who have diabetes, and/or eat a lot of saturated [solid at room temperature] fat.