gas smell in lpg vehicle

Hello guys, I have a problem with my car sometimes, sometimes not. Sometimes, when I buy LPG, there is a strange gas smell inside the vehicle, especially when I press the gas. I took it to an LPG maker, the LPG dealer said there was no leakage of the gas leak, and he tested it with the device. So why might this gas smell come from? & Nbsp;

I think you can take it to another place, I recommend you to have it checked by a machine ... There is absolutely a leak from a thin place.