Is mid-cycle bleeding after a year of using Lesiplus a normal side effect?

Hello. I have been taking Lesiplus birth control pills for a year. At the first package there were spotting. However, with subsequent packaging, everything was flawless. Withdrawal bleeding always gets after 3 tablets of placebo. Now I finish the packaging. I have one pink tablet left and for 3 days I have spotting, brown, there is also dark blood. It is scanty, less abundant than normal withdrawal bleeding. I will add that I did not miss any tablet. It only happens that I will not take the tablets at a fixed time, but the failure has never been greater than a few hours. I'm worried because I haven't had such spotting and chronic bleeding so far. Is this a normal side effect?