I just had a look at the chrome console while scrolling a bugged gallery and apparently there are a bunch of errors about undefined "googletag" and "deployads" stuff.
So I wrote a short userscript that loads the above scripts if they are missing and this fixed the loading/scrolling problems.
Try it by downloading the Tampermonkey extension for your Chrome/Firefox and use the following link to install the script:
https://my.mixtape.moe/enrfhj.user.js
The link should trigger a direct installation if you have Tampermonkey. If that doesn't work you can add the script manually with this other link:
https://pastebin.com/raw/jQ1DMpPS
There are other threads on the same issue but I figured that creating a new one would make this trivial fix more visible.
I suppose the staff may already be aware of these errors and I hope they fix them soon.