This tab contains line breaks after measures 4, 8, and 14; the original tab contained line breaks after measures 12, 32, and 38. These line breaks would have been correct if only the incomplete rows (rows with fewer than 8 measures) remained in the original tab. It appears that Hookpad 2 ignores complete rows while converting these line breaks.
I've noticed this also, but mostly with one-measure pickups turning into one-measure trailing lines, such as here in the pre-outro, where it's supposed to be 1-8-7-2, not 1-7-2-8. Original.
Not fixed in 2.3.1, and since all tabs use the new player, the only way to show the original tab is the .hkt file.