Summary:
Sortable list loses sortability if name or type changes
Detailed Description:
Case 1:
If you change the name of a Sortable content block, and update your page
template accordingly, the list will still be there and appear to be sortable but
you can't drag items to active/inactive or sort them.
Case 2:
Create a multiselect content block, submit it, then open and change the type to
sortable list. Same issue as above happens.
For case 1, you can set the name back to what it was and it will start working
again. There's no workaround for case 2, you have to recreate it and reselect on
all of your content pages if you want to switch it to a sortable list.