I haven't been able to upload replays for about a week now, thinking this problem would go away by now. When I click manage attachments to upload a replay normally, it looks like (see spoiler)

It stays like that for about 2 minutes then looks like (see spoiler)

I've seen others post replays recently and noticed I might be the only one with this problem. It's not the replay (I know this because I tried downloading someones replay then re-uploading it and I still had this problem), so can anyone help me with this please? Thanks