This is the same as your DO12 - Column Headers offset issue thread.
It's caused by a combination of very narrow columns (you're using random "sacrificial" columns set to 4 pixels wide to make them look like borders around other columns), and using multi-sort mode which has to add extra sort buttons to the left of the column header.
If those sort buttons are thinner than the first column, the problem occurs. We spent some time looking at it but it's extremely difficult to fix, and not something likely to happen under normal use.
If you remove that first 4 pixel Full Path column, the problem will stop.
You'll probably also find things speed up if you remove the 4 pixel Duration column as it has to open and parse every media file in the folder to populate its information which you aren't really showing. (If you want some dummy columns to use as 4 pixel borders between other columns, making a simple script add-in that adds 5 columns that don't display anything might be a good idea. Then you can use those columns instead of random built-in ones.)