"No applicable field found." in deeply nested schema

[johnmorrell]

Describe the bug
In a deeply nested schema a valid JSON schema can fail to render form elements, instead presenting "No applicable field found.".

To Reproduce
Can be reproduced with the following Schema:

{
   "type":"object",
   "properties":{
      "Level1":{
         "type":"array",
         "items":{
            "type":"object",
            "properties":{
               "Level2":{
                  "type":"object",
                  "properties":{
                     "Level3":{
                        "type":"string"
                     }
                  }
               }
            }
         }
      }
   }
}

Interestingly if the bottom most element that is failing to render is nested further in an array, it does render correctly but not an object within an object.

Expected behavior
Text file to be rendered correctly.

Browser (please complete the following information):

• Browser: Safari
• Version: 12.0.1

Used Setup (please complete the following information):

• Framework: React
• RendererSet: Material

[edgarmueller]

Thanks for the report, we'll have a look soon.