I have this problem on occasions. My advice is pretty much the same as Julian’s - whenever you take your RC’s, expect them to tell you that you’re dreaming.
That way, if you are dreaming, they’ll work .
But the simple fact that you’re doing RC’s in dreams is a good sign on it’s own .
well, except what the other guys have told you, i can tell you i had the same problem, and after a while i’ve just realized the my RC’s didn’t work because i was not fully mentally ready for LDing. dunno why, i guess i was afraid of this. try working out on yourself, and when u feel ready try LD again.