Hover Feature glitching

I am creating a photo sharing site and I have a feature where when you hover on the photo it darkens. The photo is meant to move with the user, however, when the user is not scrolled at the very top the photo glitches. It still hovers, but it goes up and then back down. Does anyone know why it is doing this?

Hi, Elliot.

Is it possible to see a video regarding this issue?

Thank you.

It says new users cannot upload attachments.

or you can also share the prototype or the file through links or upload it on a different platform and send the link here.

Thanks.

Is it possible to send the prototype version of one screen? I just don’t want to send the whole prototype