I haven't had many, but in all the lucid dreams I've had, any and all dream characters vanish upon becoming lucid. If I'm standing in a large crowd, then the crowd disappears. I can't summon them or keep them there while lucid, despite the different techniques I've tried!

I must say, I'm getting rather lonely in my dreams! Has anyone had a similar issue? Any suggestions to resolve this problem I've been having? I'm sure it's just a lack of dream control, but any opinion is appreciated!