Strange GPO behavior (windows update). Why?

Question

System administration

Help me understand:
In the policy, the item: "Allow non-administrators to receive update notifications" is set to Disabled
The user is not an Administrator on the server (Windows 2012 R2), but he sees a message about the availability of updates: he

can click the install button, but he will receive a message:

i.e. e. in fact, it cannot install updates.
But at the same time, I am an administrator, I also cannot install updates:

The policy that applies to this server also applies to some other servers, and so, I can normally install updates on some servers, but not on others. There are no third-party policies for updates.
Here are the items in the GPO I have configured:

Answer 1

Do a gpresult on the server and make sure that all the settings arrive correctly on it.
Run from Powershell (Run as Administrator)

Gpresult /h $env:USERPROFILE\desktop\GPResult.html /f