I've had my '21 Tremor for about 3 weeks now. Last week the touch screen starting acting up. What it was doing is basically having a mind of it's own and staying on the Nav screen but constantly moving around. None of the other buttons would work if I tried to go to a different screen. I took it to the dealer he said he's seen this before and it's a programing issue and there is an update for it. They do the update and I drive it home and it appeared to be fine but right as I'm about to pull in the driveway it starts acting up again. Anyone else having a similar issue?