ReactingFoam - Premixed Flame, problem with flame height
 

Hello everyone,
I am trying to simulate a premixed methane-air flame with reactingFoam.
The ignition is provided with a temperature source, and when I run a cold flow simulation; all the cold flow properties are OK. Also, the velocity at the burner exit is OK. I am using WALE as the LES model, and PaSR as the combustion model. I am using the EulerImplicit chemistry solver.
I have no problem with obtaining a stable flame, however, the flame height is twice than expected. I tried to refine the mesh; change the ignition box's height, position, and duration, but none worked.
Can anyone help me with this problem?
Thanks and regards.