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.
I copy any of my comments that took a while to type (longer, detailed, or sometimes just adhd) before hitting submit. I’ve been burned too many times from all different areas of technology. If something goes wrong, just try again and paste whatever I typed out