It is normal and it is still worth reducing, which is the bit people miss. Several times a day means he is properly hormonal, and chronic hormonal behaviour in lovebirds turns into biting, screaming, and in hens chronic egg laying, which does real harm.
So take the bell out or rotate the toys so he cannot fixate, keep petting to the head and neck only, remove anything hut-like or dark, and give him ten to twelve hours of dark quiet. Long days are what drives it.