With the sluggishness of the site these last few days you can sometimes get slowness or infinitely loading icon when hitting submit. If you aren’t sure if your post submitted, refresh the original page in a different tab before hitting submit again to see if it went through. I see double and triple posts in almost every comment section.
Just to add to this, at least in wefwef, I sometimes get an error when I tap Post, saying that it failed. I am then left on the page, and can hit Post again. But it didn’t fail the first time, the post was made.
So this is not just users being impatient. There is a bug.