Posting to lemmy.world fails all the time [Issue Closed]

I was trying to reply a post at Costco@lemmy.world : https://lemmy.ca/post/1127818 , origins from https://lemmy.world/post/1020538

When I clicked "Reply", the little circle on the button had been spinning and never finished.

I refreshed the page, and no surprise, my reply was not posted successfully.

Similar issues has been happening to me in the last few months, and now I finally wrote my issue report.

Is this issue due to our site or their site?

Edit: Closed this issue. See https://lemmy.ca/comment/4133550