When grouping multiple objects (cards) into one, one of the objects will not trigger onObjectEnterContainer().

I configured onObjectEnterContainer() in Global and group any number of individual cards together.

If I had 7 cards selected and stacked them by selecting them all and then pressing G, all but one of them will be passed to onObjectEnterContainer() but the remaining one will never be passed to onObjectEnterContainer() as a bag or an item.