As an example, see measure 17-24 in this tab.
Expected: Only 8th notes are swung, as it usually is. 16th notes all have the same length.
What Happens: 8th notes are swung normally, but 16th notes are played as if each pair had their length of swung 8th notes.
How to Recreate: Make a tab with a swung tempo, place a continuous string of 16th notes, then play it back.