i did it but it is still showing in the middle, help me
Can you disable the caching plugin again to check if the issue stops occuring?
If the issue stops occurring after disabling then the problem is the cached CSS being served the by the caching plugin for your site.
Purging the caching plugin normally solves this issue. If it doesn’t, perhaps the caching plugin you’re using has issues. In that case, you’ll have to contact its developer to address the issue.