Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.66.2 (system setup)
• OS Version: Microsoft Windows Version 21H1 (OS Build 19043.1526)

Steps to Reproduce:

1. Create a new object using object literal with two or more properties and a method:
   let obj = { x: 10, y: [1], fun: function () {}
2. Now, inside the method, addressing to the properties using this keyword is recognised by the IntelliSense/autocomplete.
   this. - results in
   
3. Change the value of a property inside the method, for instance
   let obj = { x: 10, y: [1], fun: function () {this.x = 5;}}
4. Now, only addressing to the property x is recognised by the IntelliSense/autocomplete:
   
   Even though y property is an array, IntelliSense won't show its methods and properties:
   

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