this may or may not apply to your bow.
had this osage bow that split very soon after getting started floor tillering.
filled the crack with super glue early on.
then once final tillering was done and i'd had a short string on it.
i "patched" like this
soaked and stretched the rawhide as much as i could, then sewn with real sinew.
sized the area the rawhide was going on with titebond II.
then used a bit more glue just like i was rawhide backing the bow.
let it sit for a cupla days and shot about 50 arrows thru it last nite.
(this bow shoots mighty nice)
seems to be holding up just fine.
the crack did not run out the side.
and was following the grain which also does not run out the side.
but the tips are narrow enough, felt like i wanted some extra insurance.
i think this will hold up as long as the bow.
it shrunk really tight.
dont have pix of the other side right now, but will take one if you like.
good luck