I have the same issues with my 2018 NX 300H F Sport. Lexus are aware of this fault on various models. I have been told by Lexus the have a remedy kit for the sensors, but it does not fit the F Sport grill and they do not know when they will have a resolution to this issue. I have contacted trading standards and they tell me this sort of issue is covered by the Consumer Rights Act 2015. I have given Lexus another 7days on top of the 6 months they have had to resolve this.