Recreational Vehicle Lpg Tank Valve/gauge problems of the 2012 Dodge Grand Caravan

Over the past 2 months our 2012 Grand Caravan has been having an unknown issue. We will be driving along normally then the power and engine will all cut out this has happened in multiple environments from crossing railway tracks to running down a smooth road, thankfully this has not happened yet on the highway, we are left coasting with no power steering or anything until we can safely stop put the van in park and restart the engine. The van restarts every time straight away with no problems. The other day before we took the van to the local Dodge dealership for them to investigate the issue, the console stayed with no power but I was able to start the engine, the fan and radio also worked at this point, after driving 5 to 10 meters the dash console came up with all the gauges working again. It has now been to the dealership twice now and they are unable to replicate the issue or know of a cause. After reviewing forums it seems that other van's from various years are having the same issue. Sometimes when it does it, it catches itself at the last second and the engine stays on and the console comes back up to normal though this is maybe a 1 in 5 occurrence. One of the times it happened we put our fixd in the care and the screenshot attached is what information it showed, the dealership only found 1 of these 4 fault codes.