'Scroll Bar Hiding and Unhiding on pages load

I Tried to find some topic about this issue but i haven't found..

I have a problem on my website, when loading my pages, the scroll bar get hide and unhide just for 1 second that causes content to shift fast..

Yes, i already have tried this code, and i'm using it now:

html {
    overflow-y: scroll;
}

However the problem still there. This problem occours on the latest version of google chrome.

I have a live example if someone want to see, just switch to home -> episodios page: Live site

I apretiate your help!

javascript html css

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