This is my second season with the LM2022SP self-propelled brushless mower. Fantastic mower. The only thing that's driving me absolutely nuts is that the green self-propelled lever won't work about 20% of the time. I have to pull the green lever two, three.... sometimes four times before the mower will take off moving. It's driving me crazy having to pull the lever multiple times to get the self propelled mode to engage. Is anyone else having this intermittent problem and what is the fix for it?