Car Stall problems of the 2024 Hyundai Elantra

We lease 5 Hyundai 2024 Elantra blue hybrids that were bought new a few months back. We have experienced the same issues with 3 of the 5 so far. Cars will stall at low speeds and sometimes engine light goes on. Cars will suddenly not accelerate after stopping at a stop sign. Extreme danger for our drivers who are transporting developmentally disabled clients to outings and shopping, etc. Hyundai replaced throttle body replacement but same issues reappeared 2 days after getting car back. Now, Hyundai is claiming the gps units plugged in may be causing this, but other 2 are not experiencing this issue (2 of 5). They refuse to work on further unless gps units are out, but customer needs gps units per insurance. So we need help from Hyundai in dealing with the dealer zimbrick east of madison, WI. We need the vehicles, but don't want our employees at risk.