I feel for you.
I grafted 3 plums, 1 peach and 1 pawpaw (multiple grafts of each, at least 2 each).
2 plums quickly pushed growth. 2 of one variety and 1 of the other.
Then our weather got weird…
1 pawpaw graft pushed its terminal bud this week. All the plum graft’s growth has died.
Its nice seeing the graft push growth, its a real kick to the gut when it dies…
Scott