I have code intelligence disabled, but in my team section for students the autocomplete still happens (even with code intelligence disabled in both my end when creating a program and their end when working on a program).

1. Open Settings
   

2. Scroll down

3. Click that arrow after Code Intelligence
   

4. From Enabled, Make it disabled
   

That's it!

To know more about Code Intelligence, Check this picture out

Or visit this website:- Click here

Hope this helps
Please mark my answer if this helps

go to the side bar that has all your files version control etc click on this icon:

then in the scroll down menu disable auto complete or code intelligience as its called