Is the repeated appearance of certain verses during night recitation, after involuntarily repeating them during the day, considered a divine coincidence and a miracle of the Quran, knowing that this phenomenon has strengthened faith despite limited memorization?

It is not possible to definitively interpret what is happening to you, but everything that occurs is by Allah's decree and destiny. We hope that your remembrance and recitation of Quranic verses will be good for you, a help in obedience, and an encouragement to memorize the Book of Allah. For the Quran is goodness, mercy, and healing, as Allah Almighty said: "O mankind, there has come to you an instruction from your Lord and healing for what is in the breasts and guidance and mercy for the believers," and He said: "And We have sent down to you the Book as clarification for all things and as guidance and mercy and good tidings for the Muslims." We advise you to be mindful of Allah and to memorize His Book.