hand gesture classification model sometimes errors when added instead of imported

Not sure why/when I'm getting this error:

`Failed to run gesture recognition model`
`Aborted(Module.arguments has been replaced with plain arguments_ (the initial value can be provided on Module, but after startup the value is only looked for on a local variable of that name))`

This one didn't have errors when I imported it:
[working_hand_example.json](https://github.com/google/visualblocks/files/13304238/working_hand_example.json)

This one had an error when I created it from scratch, but then the error went away when I imported it:
[broken_hand_example_only_from_scratch.json](https://github.com/google/visualblocks/files/13304269/broken_hand_example_only_from_scratch.json)

This one had an error when I created it from scratch, but also still has the error even if I import it:
[bug_repro_hand_gesture_classification_from_scratch.json](https://github.com/google/visualblocks/files/13304239/bug_repro_hand_gesture_classification_from_scratch.json)