I can be invited by my friend but I can't invite them

We’re playing on playstation 4, all our privacy settings match now, we’re both friended to one another, but they never recieve a notification to join my group, where as I always get one from them.

Can anybody tell me how to solve this problem?

Feel this. Me and my boy were trying to play this morning,had a hard time connecting, when we did,we would drop out of each other’s game. Got online today with randoms though,before work and didn’t have a problem.