Very occasionally it’ll lose contact with the car which requires a hard reset to sort it, I’ve had it twice in 13 months.
To reset there’s a pinhole on the left of the dash above the camera button, press that and the infotainment screen will go black as it resets, only takes a minute and can be done while driving as the main screen isn’t affected.
Also the latest software update means the buttons for the passenger seat heating and ventilation often dissappear from the climate screen. A short press on the voice control button on the steering wheel and you can tell it to “activate passenger seat ventilation (or heating)” and include “to level 1” or whatever level you want or it’ll go to 3 itself. Usually after doing it by voice the buttons reappear for a short time. Hyundai are aware and hopefully will get it sorted soon 🤞⏳️ 🗓 🤷♂️