I have a strange issue with Kanban board in VSTS (Web). We use a customized process from Agile. Our Product Owners sometimes change the work item types (for instance change a Bug to a User Story).
Our Kanban board strangely hides the work items which their type has been changed. However, They are still visible in Backlog.
I have checked the filters to make sure the items are not filtered. The hidden User Stories look pretty normal when we display the details; we can even change the older in backlog. It seems when the type conversion happens some sort of hidden field gets messed up which makes Kanban fail identifying it as Backlog Item.
Any idea or similar experience?