Changing products weight at admin will not be saved

Hi Tim,
If you want to change te weight of a product from a order at the admin it will not be saved.
You can change the weight from kilograms to grams and then push the save button but it still shows up in kilograms.
How to fix it?

Greetings Michel

Hi Tim,
I Think this is a bug, maybe you can fix it in a new release.