The flame will drop to a very low flame when the stove is on high for about 20 minutes. It is an Avalon Tree of Life Propane stove. Both flames have to be on when this happens. The remote thermostat seems to be working fine. I set the "smart" mode off, just in case it was the problem. When I shut the stove off for a minute or so, and turn it back on again, it works fine as long as only one flame is on.