I doubt it’s related to the relative performance of the system, but probably is a timing issue. I’ve gotten it on an HEDT 24 core machine and on a recent top end ARM iPad Pro. As you mentioned it also is likely related to the external keyboards used. I’m clumsy at first on a digital after playing my grand because I play at concert speeds on the grand action but with the clumsy digital weird things can happen. And not all MIDI hardware is created equal, they invented the panic stop for a reason.
I haven’t gotten it in a while which also indicates a timing issue, as different software builds can affect that.