For the record, I bet nobody who actually RUNS this forum told people "It's just your computer".
The only people saying stuff like that... are other users who don't actually know what's going on.
It's been happening for months to (I think) everybody.
One of our regulars has been working with Mike H. (or whoever runs the server) to try to resolve it. But so far, I don't think they know the exact cause. It doesn't seem to be a question of horsepower or bandwidth. They've tried a few fixes but they haven't done much that I can see.
I hate to say it but I think this issue probably won't get fixed with volunteer work, even if it's right up their alley. There's only so much time someone will pour into fixing a site for free, especially when their 'day job' keeps them very busy. I'm hoping Mike will consider hiring someone to look into it. I'd be willing to donate a few bucks towards the effort.