There's a glitch that happens when the Layers Toolbar is
docked and
folded on the side of the screen while using a non-maximised Frame Editor window. When you're dragging an
active object on the Frame Editor, the Layers toolbar seems to mistake the edge of the Frame Editor for the edge of the main Fusion window, and automatically
unfolds whenever the active object happens to touch the edge of the
Frame Editor. This can be a bit laggy and distracting, but the main problem is that it prevents the Frame Editor from scrolling when this happens (and since you dragged an active object to the edge, scrolling the Frame Editor is probably what you were trying to do).
This glitch happens on both left and right sides (ie. if you dock the Layers Toolbar on the left, then it'll also unfold if you drag an active object to the left side of the Frame Editor window)
