Could the weather seal around the trunk. I had an old Crown Vic that leaked, took the back seat out, taped a hose to the roof and let the water run and just watched. Water was seeping in from a bad body joint seal/weld behind the back seat. JB weld fixed it. I would not be JB welding a 21' GT...
I briefly had a 2020 GT w/out digital cluster but I can't remember if it had "my mode"
You can't select a steering feel, drive style (sport, track, etc) or exhaust sound and save it in "my mode"?
I thought its supposed to default to normal after each startup. I just saved my settings in "my mode" snd just toggled to that setting each time. I'm with ya, wish it stayed where I put it.