Yangman - Module form - When entering multiple list items and switching to json and back to form, list items are erased from the form

BUGGY BEH: When entering multiple list items at the level of network topology and switching to json and back to form, list items are erased from the form
1. Refresh the page. Select form view. Navigate to network-topology rev. module > config tab > click network-topology branch > expand network-topology.
2. Click yangmenu next to topology node and click "Add list item". Topology [0] list item is displayed.
4. Switch to json view. Switch back to form view.
EXPECTED BEHAVIOUR: Topology [0] list item is displayed.
BUGGY BEHAVIOUR THAT APPEARED: Topology [0] list item is not displayed. This happens also when the request is run at the level of network-topology so that the form remains filled then switched to json and back to form.