#5] Observe how order of Columns has reverted to the original one
I reckon this is not a bug but just a case of either purposely chosen behavior or a simple omission from the author of the great Everything. But I would argue that this should not be happening - i.e. re-change of Columns to default state [coming out from a reading of setup of a given Filter] should only be applied if user switches to another Filter
But are you considering a change of this behavior or maybe already have decided to do so but it will take time to make it so - or do you consider current behavior as being more beneficial to users and most likely leave it as it is?