My DELL 2-in-1 laptop does this when on battery power and plugged into a Panasonic radio at work (both directly and through a USB AI) makes the touch screen all but unusable, detecting incorrect or multiple touches, plugging in the grounded adaptor fixes the issue.
I think the main problem is that due to EMI filtering in especially un-grounded chargers there is some mains leakage to the low voltage side that can become problematic, and surprisingly the higher quality the charger the more likely it is to be leaky.
Something my previous laptop demonstrated to annoying effect given it's metalized case (on 2 different genuine chargers), plugging it into anything grounded made the case feel so weird it was uncomfortable for me to touch, attaching a grounded supply again fixed the issue.