Problem not appearing topics in Google

[younesbkr]

A problem appeared when changing the hosting plan and returned to the previous plan and problem issues
i lose 80% visitors in 1 day
The problem is that the topics appear when you type site:domain.net 24 hours But when you write the full article title the topic does not appear
what is the problem

[justpassing]

Hard to say, with so few details ( I didn't understand well the first sentence ).

Check the GSC and see if errors are reported.

[younesbkr]

when upgrade my hosting from host 1 plan to host 2 plan i lose 80% traffic after upgrade and the topics appear when you type site:domain.net 24 hours But when you write the full article title the topic does not appear in google search