wrong placement is applied

[lampersky]

Using OrchardCore.Placement module, I've created a placement and then remove it, but I'm still getting some placement applied. Looks like old cached value. I would expect the original value from placement.json file.

Steps to reproduce:

• create new content type PlacementTest,
• go to content item editor of that type and check if default placement is applied, by default I mean this one from OrchardCore.Contents placement.json,
• create new placement via AdminUI with shape type Content_PublishButton:

{
  "place": "-",
  "displayType": "Edit",
  "contentType": [ "PlacementTest" ]
}

• check if it is applied correctly, save button shouldn't be visible,
• remove previously created placement,
• check if is not applied anymore, save button should be visible again.

/cc: @sebastienros @ns8482e

[microposmp]

I've tried to figure out the reason for this issue and found some other side effects. When the placement for the content type "PlacementTest" in the example above was resolved once it would resolve the placement hiding the publish button for all content types.