See also this: https://www.reddit.com/r/Corsair/comments/kt81io/corsair_rm750x_fan_spinning_at_idle_half_of_the/
Link to Reddit sadly, but more people seem to have “this issue”. If you also have a GPU in there, you might just be taking too much from the PSU to idle.
Many people even only have an ID card and no passport. So requesting one would be €80 more for a trip