@@ -154,7 +154,7 @@ class ObservableArrayAdministration
     }
 
     dehanceValues(values: any[]): any[] {
-        if (this.dehancer !== undefined && this.values.length > 0)
+        if (this.dehancer !== undefined && values.length > 0)
             return values.map(this.dehancer) as any
         return values
     }
 
@@ -1,6 +1,7 @@
 "use strict"
+
 var mobx = require("../../src/mobx.ts")
-const { observable, $mobx, when } = mobx
+const { observable, $mobx, when, _getAdministration } = mobx
 var iterall = require("iterall")
 
 function buffer() {
@@ -492,3 +493,19 @@ test("concats correctly #1667", () => {
     expect(x.data[0]).toBe(first)
     expect(x.data.length).toBe(11000)
 })
+
+test("dehances last value on shift/pop", () => {
+    const x1 = observable([3, 5])
+    _getAdministration(x1).dehancer = value => {
+        return value * 2
+    }
+    expect(x1.shift()).toBe(6)
+    expect(x1.shift()).toBe(10)
+
+    const x2 = observable([3, 5])
+    _getAdministration(x2).dehancer = value => {
+        return value * 2
+    }
+    expect(x2.pop()).toBe(10)
+    expect(x2.pop()).toBe(6)
+})
Original file line number	Diff line number	Diff line change
`@@ -154,7 +154,7 @@ class ObservableArrayAdministration`
`154`	`154`	`}`
`155`	`155`
`156`	`156`	`dehanceValues(values: any[]): any[] {`
`157`		`- if (this.dehancer !== undefined && this.values.length > 0)`
	`157`	`+ if (this.dehancer !== undefined && values.length > 0)`
`158`	`158`	`return values.map(this.dehancer) as any`
`159`	`159`	`return values`
`160`	`160`	`}`