Javascript request delays the website load time

We have a magento based website. It sometimes takes very long time to load. when i check the developer tools the merged JS file blocks the load


Even if i unmerge the JS files and try to load the same issue appears with any one of the JS files.

HTTP/2 is enabled but still the other resources are blocked by this request to load.

What could be the possible cause of this issue ?

Do we need more server resources ?

Thank you for your time and desperately looking for help !

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