I did have a chuckle at how Earth 0 Clark is slipping up with Jon by missing the blatantly obvious regarding Jon’s feelings about the twins, just like how how S&L Clark keeps missing how his Jon is clearly hurt by all the favoritism he gives Jordan. Unlike the show however I expect PKJ will actually have Clark realize and make amends for his obliviousness.
It was that initial crossover between Superman #29 and Action #1029 where Clark and Jon fought aliens coming out of a Breach in space. DC collected it here:
It was fine but pure filler. PKJ got hit with a notice from editorial that they needed another month before starting the Warworld Saga proper in Action, and he had to come up with something to fill both of the Superbooks for a month at the last minute.