While editing text fields in a filter view the first couple columns (which are mandatory and unchangeable by the end user), switch places when a row is edited. Here’s an example where I edited content in three rows (in Account Reviews) and as each was saved the first two columns switched.
[ADDITIONAL]: This reordering of columns also occurs if I drag columns to change them manually. For instance, I wanted the Date column to be further right in a filter so I dragged the column over. As soon as I dropped the column in its new position the first three columns (which order is locked) changed.