While tire pressures could be a contributing factor, it’s hard to use that as an adjustment in this case because typically you’re seeing this kind of hopping when the track is hot and grippy, and you are sort of boxed in on the tire pressure you need to run in this situation to keep the tire from overheating.
If you can definitely attribute a handling issue to a tire overheating or not getting enough temperature, then you can adjust the pressure to fix that. But usually if pressures are too low, you aren’t going to generate enough heat to get the kart to become overstuck. The more common issue is too high of pressure, causing the kart to start sliding over the course of the run. That’s the main thing to look at when considering if pressure is the issue. If the kart handling continues to worsen over the course of a run, then you know the pressures are likely too high, and other adjustments to the chassis may need to be made too. The other issue you see is the driver reporting that the kart “never came in”, in which case you would up the pressures to get the heat up faster. In both these cases, pressures being too low and being too high, the kart has a tendency to slide the front and rear. One case because the tires are too cold, and the other because they are too hot.
I don’t really like to use pressures to tune the weight transfer or mechanical function of loading and unloading in the chassis, because you can easily go outside the tire’s optimum temperature range, and the entire handling of the kart can go to sh*t. For me, pressures are better suited to fine tuning the kart’s consistency over the run. Almost like you put the tire pressures/temps in a different category than your kart’s other tuning adjustments.