I've been having the direction keys stick down while trying to make my own character controller with Playmaker.
At first I thought it was because I was using the old Character Motor script with Unity 5, but it turns out it happens with my own system too.
I'm attaching a screenshot of the system I'm using for it right now, but the more standard system using a Character Controller and a Controller Simple Move action has the same problem.
It only happens every now and then so it's hard to track down. Never used to happen in Unity 4 or possibly earlier Unity 5 versions. Or maybe it's only since I started using the Playmaker 1.8.0f43 beta.
So has anyone else experienced that, having Playmaker not detect you released a held button when using the Get Axis Vector action?