Severe weather conditions: sudden gusts of wind, snow load, fog, heavy rain. When there is no reliable visual contact with the runway, it is better to additionally calculate everything.
Change in wind speed and direction.This can lead to a change in the direction of flight on the landing straight, and the ship simply does not fall into the runway. We have to repeat it.
The landing approach is not stabilized — the required parameters of altitude, trajectory, engine operation mode are not maintained.
Crew error when calculating landing — this also happens, although quite rarely.
Information received from the controller about the inconsistency of the position of the aircraft relative to the pre-landing glide path(flight trajectories). The pilots themselves, when approaching through inaccurate systems, cannot adequately assess the situation and obey the command to go around.
What else to read on the topic
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10 Good Reasons Why You Can Be Dropped Off a Plane