Does a worshipper's seeing his own 'awrah (what is below the navel) through the neck opening during prayer invalidate it, given that no one else sees it, and is this considered similar to seeing the 'awrah through the garment opening mentioned in some fatwas?

"Obsessive thoughts are dangerous, and their cure lies in disregarding them and seeking refuge in Allah. If a part of the 'awrah between the navel and the knee becomes exposed during prayer, the prayer is invalidated, even if no one sees it, as mentioned by Ibn Qudamah. However, if the 'awrah is not exposed for some reason, such as tight pockets or something covering it, the prayer is valid. This aligns with the madhhab of Imam Shafi'i and some Malikis. It is better and more appropriate for a Muslim to pray in his finest and most covering clothes, out of reverence for the rituals of Allah, in accordance with His saying, 'O Children of Adam, take your adornment at every masjid' (Quran 7:31)."