@Darklight99 You're missing the point that I made. In any story with a sudden gender swap, it is perfectly reasonable for the readers to expect the cause of the sudden gender swap to be a significant plot point. Importantly, it's not only reasonable but also highly expected.
Let me be clear. That does not mean that the author NEEDS to fulfill reader expectations. It's fine if the author wants to break the mold and defy expectations. The problem is that here, the author has done that badly. We are 23 chapters in, and there's zero indication that the sudden gender swap is at all significant to the plot, exactly as you said. And exactly as I said, that's just bad writing because it sweeps it under the rug.
It would be completely different if, for example, the author simply had a couple of panels saying Itsuki/Izuki has an extremely rare medical condition that caused this, and then the author just moved on from there. The author doesn't need to dwell on it. It could be fast and over with. Done. That didn't happen here. In fact, literally nothing happened here. Again, the author swept it under the rug.