Does the sensation of air exiting the anus during prostration (sujud) and the testification (tashahhud) nullify ablution (wudu)?

If feelings are mere doubts and whisperings, pay them no attention, and their cure is to disregard them. No matter how much you doubt the emission of wind, act on the presumption of its non-emission. Do not interrupt your prayer unless you have absolute certainty that your ablution has been invalidated, based on the Prophet's (peace and blessings be upon him) saying: "He should not leave until he hears a sound or perceives a smell." However, if you are certain that wind has been emitted, then the prayer is invalidated, and it is obligatory to repeat it after performing ablution, unless the matter reaches the extent of incontinence.