Shrinking Logo On Scroll error - Can't scroll down

Problem: When in the resolution of 2560 x 1440 and I try to scroll down using my mouse wheel it gets stuck and goes back to the top. 

I don't have a problem in 1920 x 1080. I have this CSS code installed:

// Shrinking Logo On Scroll - 7.1 //

.header.shrink img {
    max-width: 120px;
    transition: all 0.2s ease-in-out
}

.header img {
    transition: all 0.2s ease-in-out
}

 I attached two brief screen recordings to show the problem.

Thank you so very much! This was the last thing I needed for my website to be officially complete! I love you so much! 😄❤️

1 minute ago, MadameTiffany said:

Thank you so very much! This was the last thing I needed for my website to be officially complete! I love you so much! 😄❤️

Glad to have been a help!