I use biscuits and never account for wood movement. I'v e never had a
problem with it myself. I've done this with mitered and butted joints
at the corners and with 1/4" to 3" wide edge bands. Basicially, to get
the hard edge to stay snugged up to the ply edge I've always had the
glue the whole length.
Also, just an FYI it's typically called "edging" or "banding" vs