Is this suppose to happen?

Using Left Shift will allow you to control yourself, rather than your Marionette. If you click something on the ground while holding shift, The Marionette will start walking. It is not a bug and it is intended in the case that you need to move yourself, rather than the Marionette.

I don't think the shiftkey functionality is what he was asking about.

Shift doesn't stop the marionette. He probably had the bug where if you lagged for a moment and click, you'd keep going. Either that or he pressed Number Lock to enable auto running. Sounds like a Lag issue. Other than that, I'm not sure what to say about it :x

Nope, I tested this right after he posted. It's not due to lag for sure. Using the wasd keys with puppets, shift clicking or not, makes your puppet run forever, even without automatic running.

Wait....WASD? as in movement Keys? It's not happening for me.

It only seems to happen after hitting shift right after you press a direction in quick succession.

I used to get a bug like this a lot, and without a puppet out. If i tapped w a s or d, my char kept going until I pressed a different movement key or clicked. This happened a lot more to my puppet than to my char though. I it's not happening now so maybe it's related to lag, but when it was happening to me, it was usually only happening for one or two keys on any given day(S was always one of them, W usually wasn't).

I have mine Mapped to arrow keys since I'm sooo used to the interface prior to wasd movement.