Safari can't load reddit in new tabs

I'm having a weird problem in Safari on both OS X and iPadOS with regards to opening things in new background tabs. Wondering if anyone else has had this and know the fix.

Reddit is the website this happens 100% of the time. If I open a page/thread in a new background tab it won't load. Even when I go to the tab itself and hit refresh it won't load. Any link from Reddit that is opened in a new tab just won't function regardless of refreshing or anything. It's like the tab just opens completely broken and is completely corrupted and unusable. I have to copy and paste the address in a new tab and watch it load for it to work. If I navigate through a link in the current active window without it being in a new tab it will work though. This does not happen in Chrome browser so it is a Safari issue.

I've been trawling Apple support and Reddit for anyone who has had this problem before or knows a fix but I've had no luck. Hoping someone might have experienced this and knows a way to address the issue.

I've tried clearing internet files/cache, restarting, I'm not sure what else to try. I do not have an AdBlocker.

Any help is appreciated.