My son and I have that problem. At first I thought it was because he uses an iPhone and I use an Android. What I did to get around this bug is to connect his account to my Facebook account on my phone. Mine is connected through Google. So, If I see something on the map that he doesn’t, I log out and let him log in to his account on my phone via Facebook. Unfortunately, it doesn’t work in reverse as I cannot log in to my account on his iPhone. I hate to have to do this because it makes everything take twice as long, but I see no other way to fix it. If he sees something that I do not, there is no way for me to get it.
I hope support chimes in soon.