Yup! I've seen that before. Just got home from work tonight and my next door neighbor was in his driveway with the hood open ... same problem ... but with a 2003 Ford Taurus sedan (160k miles). I read his OBD port and, sure enough, Misfire on Cylinder #2 (plus 3 other Codes ... one of which was his O2 Sensor ... can't recall the other two, but he took pictures). He said he was having the flashing CEL whenever he punched the gas. At Idle, in the driveway, it sounded fine ... but when he started steadily pushing down on the Accelerator, you could hear some light "skipping" or "choppiness" with the Engine's firing. We quickly pulled his three front plugs (#4, #5, and #6) and found they were wet with oil ... so I think he might have a bigger problem ... like oil getting past his Rings, soaking the Plugs.
But for you, with a much younger 2019 Terrain ... and no history of that kind of thing found License Plate Lookup | License Plate Search online
... maybe just read your OBD-2 port and see if you've got a P301-P304 Code for a mis-firing Plug. That might be all it is. If you don't have a Code Reader, your local chain Auto Parts Store will usually do it for free (O'Reilly's, AutoZone, Advance Auto).