The app needs to be open, even if it’s just sitting in the background to open the car unless you’re using a key card/Tesla ring (cnick)/Apple Watch. It’s been like that for ages.
Reboot your car and that will help, I suggest you reboot after every update btw. To reboot for those who don’t know, press and hold both steering wheel buttons until the screen turns black. Our Y seems to still need the brake pedal, YMMV as my 3 doesn’t require the brake pedal anymore