When an item is in time selection of the same length (set with "Set time selection to item"), time selection is always drew 2 px shorter, no matter how zoomed is the arrange. Functionally it is OK, this is a visual bug.
Time selection should end probably 1px later to encompass the whole item, or maybe 2 px later to catch also the shadow.
zoomed out
zoomed in
magnified in photoshop