Finding the bar that rushes
A rushed fill may begin with what happens in the bar before it.
When a recording reveals a rushed bar, note the song, section, and approximate location. Listen again to decide whether the tempo starts moving before the fill, during it, or when the groove returns. That distinction gives you a more useful practice target than “work on timing.”
Loop three bars: the approach, the troublesome bar, and the return. Use a metronome at a tempo where you can count through all three. If the approach accelerates, practice it without the fill. If the return is late, shorten the fill and rehearse the hand movement back to the cymbal.
Record another pass at the song’s tempo and compare the same three bars. Keep your note specific: “last two eighths before chorus rush” is something you can check next time.