Training: changing dates breaks imputer.

[mateuszmatu]

The previous dates we had were these:

  training:
    start: 2012-01-01
    end: 2022-06-30

  validation:
    start: 2022-07-01
    end: 2023-09-30

  test:
    start: 2023-10-01
    end: 2024-12-31

This works nicely, but we wanted to change them to have nice whole years:

  training:
    start: 2012-01-01
    end: 2022-12-31

  validation:
    start: 2023-01-01
    end: 2023-12-31

  test:
    start: 2024-01-01
    end: 2024-12-31

However, for some reason this breaks the imputer, and training crashes because there are nan values in the data. I tried a few different dates, and it seems that it magically works for some dates and not for others.
Looked through the missing dates, to check if the new dates start/end on a missing date, but everything seems to be in order.
Not sure what causes this.