I have a problem in my website
It sometimes returns to a previous time with old posts!
Note that the date of WP in my theme in correct, but the posts are old, for example today it shows the posts of about a month ago!
It may be from the cache, but I don't know how to fix it
Please help me that what the problem may be:the Host, my theme, or the transferring process?
Note 1: sometimes from one IP it shows the site correctly, and from another IP wrong(old posts)
Note 2: I sent a ticket to the web hosting service, But they said that the cache of all their servers are inactive!
Note 3: this is my website: Salamgonbad.ir