Mom in hospice care and seeing and talking to people

I hear this is common. Is it? My mom is in hospice care at her MC facility. I was with for a couple hours today.

I would talk to her and she would answer back. She was more alert than she has been in a couple of days. I felt like it was a gift to be able once again to say something to her and she responded. It was mumbled, but I could understand.

She grabbed my hand. I told her I loved her and she said she loved me back. I gently rubbed her back, and she said it felt good and thanked me.

It was just the two of us in the room. I noticed her looking up into the corner of the ceiling. Her gaze was unfocused. She occasionally raised her arm and held her hand out for a few moments.

She said my dad's name several times.

She pointed across the room and said "pull a chair over". A few seconds later she said "well, I guess you can't get it over, can you."

She also pointed to the ceiling, smiled and very clearly said "well, how are you?" She laughed.

I asked her who was with her. She told me grandpa (my grandpa). I repeated it to myself "wow, grandpa". I was surprised she answered me and just said "yes" and shook her head.

Whatever this was, she was happy with it all. She seemed comfortable and not in any pain. It all seemed harmless. The caregiver said to just go with it, so I did.

I would like to think she is seeing family and friends who have passed. It almost seemed as though she was in the middle of a party with a bunch of people coming and going.

Has anyone else experienced similar with a LO in hospice? Is this a common thing?

Thanks.