Problems with match() (flooding/drying)

Hi,

I'm experiencing a bug with the `match()` function. Sometimes, I get an error in the function`_get_global_start_end()` defined in matching.py. My understanding is that this function checks the begin and end times of the model results passed to it and defines those as the "period" to match the observations.

When trying to match, I sometimes get an `AssertionError` in the following line:

`` assert all([len(x) > 0 for x in idxs])``

The model results are of type `DfsuModelResult` and the observations are of type `PointObservation`. Both have well-defined start and end times, but they do not overlap perfectly.

Is there something I'm missing here?

Best regards,

Victor