I have made the experience that many of those backup programs - especially the ones built into Windows - do strange things that I do not understand. That is why I just copy my data manually to an external drive or make an image of the data partition (on those systems where I have a seperate data partition) using free Macrium.
I also recommend to enable restore points on data partitions and allocate sufficient space for about 10 restore points. That is often handy if you lost files. They are easy to recover with
Shadow Explorer