Is there a fix for this or do I just need to lift my feet out of the way until he's done is bit
You make it sound as this is a "bug", it's more like a missing feature and having a single animation for the pushback crew, instead one that changes (by adding crouch, for example), depending on some airplane-specific criteria, and it's not any different then passengers not crouching to go through doors of smaller planes.
And yes, of course it's planned, because it will allow to expand GSX to be more usable in smaller planes.