On my side, I just want to enable one notification and if I don't put a breakpoint before the setNotify, it doesn't work
This is what I get if no breakpoint
I never had this issue, possibly because I do BLE with a state machine "checklist" that retries each step several times until Success = True.
Or... maybe I do have the issue, but it's masked by resilient (some would say: pessimistic) programming. But I don't remember seeing many retries when testing.