What is the ruling on unintentional sounds emanating from a worshipper during prayer, such as stuttering, yawning, and breathing, and what is the ruling on doubting whether they were intentional or unintentional?

The sound that comes out of the worshipper due to yawning or blowing, if two letters appear in it, invalidates the prayer according to many jurists, but not according to others. As for stuttering, it does not harm the prayer because it is a congenital defect that is excused. However, some scholars disliked the imamate of a person who stutters, except for one like him, if it adds a letter. One must be careful not to give in to obsessive whispering (waswasah).