kerregan Editing/saving a charge window definitely does that. Also, toggling a charge window to active.
Basically, modify individual slot selections after you have saved and configured your Agile charge windows, which makes sense.
Someone could have extended their charge window and added a greater number of cheap slots, so it's simpler to recalc for all active charge windows at that stage.
However, selecting or deselecting individual slots and saving after 16:35 will not make them pop back up.