Hello!
I'm seeing multiple_select fields not render correctly when in a subfield. I'm using CKAN 2.8.1. I have attached the json I used to reproduce the issue (multi_select.txt, txt because github doesn't let me upload json) and an image of what I'm seeing (multi-select.png).
My development.ini has:
ckan.plugins = stats text_view image_view recline_view scheming_datasets composite
scheming.dataset_schemas = ckanext.scheming:ckan_dataset.json
ckanext.scheming:multi_select.json
scheming.presets = ckanext.scheming:presets.json
ckanext.composite:presets.json
scheming.dataset_fallback = true
Thanks!

multi_select.txt