Does the prayer become invalid if one pronounces the word "Bismi" with a sukoon instead of a kasra, or omits some letters from words like "Ar-Rahman Ar-Rahim" and "Maliki Yawm Ad-Din" due to obsessive whispers (waswas), and is it permissible to continue reading with these errors without repeating them?

We warn against obsessive whispering (waswasa) because it destroys a person and corrupts both their worldly life and their afterlife. Whoever is afflicted with waswasa should ignore it and not pay attention to it. They should know that the matter is easier than they imagine, and that Allah is merciful to His servants and does not burden them with what they cannot bear. One should pray normally like other Muslims, reciting Al-Fatiha once, and reciting the verses without pausing at every word, and reciting the verses one by one as the Messenger of Allah, peace and blessings be upon him, did, and not raising the voice except where legislated. If Satan whispers about a mistake in recitation, one must ignore his whispering and continue the prayer, and seek refuge in Allah from Satan, for he does not advise but rather seeks to instill waswasa. It is known that pausing on the "mim" of "Bism" with sukoon is not a mistake that alters the meaning. Rather, one must abandon and reject these whispers.