Peugeot 206 1.4 X-Line Lpg Fuel Consumption Problem

Hello everyone, I recently filled my vehicle's lpg, and I encountered a very strange situation or it felt strange because I haven't used lpg for a while. I filled the LPG, but after 134 km, the LPG screen turned on the red light, because I was curious about the situation, I filled it again later, without waiting for it to be completely finished, and it took 138 lira of gas, rough draft, it burns 1 lira wherever you look. Do you think this is normal? In addition, there is a catalyst problem, when I use it with LPG, the engine warning light comes on after a while, when I connect it to the pc, it seems that there is a catalyst problem, most masters say that there is no need for it. What would you recommend for this problem?