A weird experience I had at my grandma's house in high school

When I was in 9th grade, my paternal grandfather passed away on my grandma's bed. After the funeral, whenever I slept on that bed at my grandma's house, my deceased grandfather would always appear in my dreams. He'd say 'Hey, come out' in my dream, but I always refused and woke up. One time, my mom slept next to me, and I still had the dream. My cousin slept in that bed and was perfectly fine, though. When I told my grandma and dad, my grandma got angry, saying 'This old man is trying to take his grandson,' and my dad said, 'Grandpa really loved his first grandson.' Later, my grandma's house was redeveloped, and we moved to a different house in the same neighborhood. We threw away the bed, and after I started sleeping in a new bed, the dreams stopped.