I have recently started using on-line Mathematica, and found some unexpected features in the on-line version which seem to be discouraging. I uploaded a notebook which is running smoothly in the desktop version, but which doesn't exhibit the same behavior when it runs in the cloud.

For example, I have a simple graphics object, say a Line, depicting an angle, whose vertex is controlled by a dynamic locator. This object is simply omitted and does not appear in the on-line version.

Another example: in a series of plots controlled by a radio button bar, I have sliders which must appear only at some specific values of the button bar, and this is controlled by a PaneSelector. This runs without a hitch in the desktop, but in the on-line version it doesn't work as it should, and all the different sliders appear simultaneously. And, in any case, the sliders do not run smoothly and only reflect the expected motion when the mouse button is released.

I wonder if this is the way the on-line version is supposed to work, in which case it appearse to be useless for my purposes.