I do not assume that anyone cheated in the following hand, but I notice many similar hands on GGPoker where someone goes all-in with a completely random hand and ends up having the nuts. Obviously, recreational players can be more unpredictable, especially in bomb pots.
There is a red envelope promotion on GG where, regardless of whether you fold your cards or not, you still receive the same bonus money. In the next hand, a reg raised with 64s, another player went all-in, and the reg snap-called, ending up with the nuts. Is there any logical explanation?