I don’t inherently see anything wrong with this recipe. All I can figure is that @TT must have added the oil, given it a stir and called it a day. I’ve made that mistake and while my gummies didn’t melt on me, they were unsightly, didn’t set right, and tasted terrible because all the infused oil separated out.
I don’t use lechitin (I said that before but maybe it bears repeating) so I don’t have a clue if that may be adversely affecting the recipe for some reason.
I do stir stir stir the whole time, and add the oil last - I stir the oil in thoroughly, if I can see it on the sides of the pan it’s not well-mixed enough.
If it’s melting, chances are not enough gelatin for the amount of liquid. I can’t think of anything in cherry juice that should behave differently than water or passion tea concentrate (that’s what I use). But that’s all I can think.
Edit to say: I would throw them all back in a pot and melt them back down, add another packet of bloomed gelatin (probably with 1/8 cup of water) and stir stir stir til it’s all melted down and reincorporated. Try setting them again.