I’ve had a few “dreams” (I wouldn’t really classify them as dreams since the person you are talking to is real) in which I have been contacted by my deceased mum.
IMO you should value them. but not actively seek to have this type of dream.
There is a topic here about visits from the dead in which some members have discussed if the deceased was real or a DC. “Meeting the dead in your dream” [Meeting the DEAD in your dream)
also “visits from the dead” [visits from the DEAD)
I have moved this from the gathering to “Beyond Dreaming”