And as it seems, there are not a few who love to invent sins for themselves. I believe that a married person who divorces and marries another sins in the act of marriage, not every minute of the day and every day of their life. They sin each time they have sexual relations, not when they do not. It is possible that they decide not to have them, in which case they can receive communion. It is true that this is not the usual thing, but the case is possible. A divorced person can live with another man or woman, and if they do not have sexual relations and watch television together, chat, and go together to a concert, they do not sin for that.
Scandal, if it were to occur, could be a sin, but that is another rhetorical device. When I receive communion, I have no idea about the conditions of those who receive communion beside me, about whom I know absolutely nothing. So there is no possibility of scandal.
On the other hand, it is not the same case if in the marriage of a divorced person they were 50 years old or 80 or more. As age advances, it is possible that they decide to abstain, and if despite that intention they failed at some point, most confessors, if they see a serious purpose of amendment, would give them absolution. Purpose of amendment does not mean never ever. Talk to a confessor, and I mean a good confessor, and you will see what they tell you.