fix: path-item $ref operation metadata storage

src/core/plugins/spec/reducers.js

@@ -118,7 +118,11 @@ export default {
     let operationPath = ["paths", ...path]
     let metaPath = ["meta", "paths", ...path]
 
-    if(!state.getIn(["json", ...operationPath]) && !state.getIn(["resolved", ...operationPath])) {
+    if(
+      !state.getIn(["json", ...operationPath])
+      && !state.getIn(["resolved", ...operationPath])
+      && !state.getIn(["resolvedSubtrees", ...operationPath])
+    ) {
       // do nothing if the operation does not exist
       return state
     }

test/e2e/scenarios/bugs/4485.js

@@ -0,0 +1,31 @@
+describe("bug #4485: operation metadata storage when referenced via path item $ref", function () {
+    let mainPage
+    beforeEach(function (client, done) {
+        mainPage = client
+            .url("localhost:3230")
+            .page.main()
+
+        client.waitForElementVisible(".download-url-input", 5000)
+            .pause(2000)
+            .clearValue(".download-url-input")
+            .setValue(".download-url-input", "http://localhost:3230/test-specs/bugs/4485/main.yaml")
+            .click("button.download-url-button")
+            .pause(1000)
+
+        done()
+    })
+    afterEach(function (client, done) {
+        done()
+    })
+    it("sets a consumes value for a body parameter correctly", function (client) {
+        client.waitForElementVisible(".opblock-tag-section", 10000)
+            .click(".opblock")
+            .waitForElementVisible(".opblock-body", 5000)
+            .click("button.btn.try-out__btn")
+            .click("select.content-type [value=\"application/xml\"]")
+            .pause(500)
+            .assert.value("select.content-type", "application/xml")
+
+        client.end()
+    })
+})

test/e2e/specs/bugs/4485/book.yaml

@@ -0,0 +1,15 @@
+---
+post:
+  description: Book
+  operationId: buy
+  summary: Buy a book
+  tags:
+  - Book
+  consumes:
+  - application/json
+  - application/xml
+  parameters:
+  - name: requestBody
+    in: body
+    description: Buy a Book
+    required: true

test/e2e/specs/bugs/4485/main.yaml

@@ -0,0 +1,5 @@
+---
+swagger: '2.0'
+paths:
+  "/v1/book":
+    "$ref": "./book.yaml"