301 1,2 vti idling problem

Hello, I just joined the Peugeot family. I bought 301 1.2 vti gasoline vehicles in 20 thousand, and the LPG was installed in the vehicle. However, when the vehicle is in petrol, the idling drops in the first start in the morning, the engine will stop and rebound, after 5 minutes, the problem passes. While lpg, there is no problem. There is this problem while in petrol. Even I closed the LPG for a week, I traveled like this, the same problem happened.

It is definitely from the LPG settings.

No malfunction lamp did not burn, but when it was on gasoline it did when I turned off the lpg

Also, after this idle falls and improves, there is a smell of gasoline.

There may be a leak in the lpg regulator. I think my pee has it checked.