This is because of the large file caching coming up with the K2 extensions and its contents.
I found two solutions to solve this problem with my website.
The first one is to clean my website cache files manually by going to Joomla back-end control panel > System > Clear Cache and clicking on the “Delete All” button.
But this is not an efficient way to clean your website cache. Because every time you must manually run this command to clear your website cache files.
Then I have found another way to do the same. There is a Joomla plugin called “Cache Cleaner” developed by a company called “Regular Labs”.
Using this plugin, you can set up your Joomla website to clear its cache files whenever you run the save command in Joomla contents you published on your website.
If you need to clear your cache files automatically according to some kind of time intervals, you can do that too.
Visit the below link to see more details about this great plugin and you can try it by downloading its free version.
Thank you very much for your valuable time spend reading this article and if you can please leave a comment too.