Very often when posting in Cyrillic (Russian) text the "Post failed. Check network connection" error message pops up.
People then think that their message has not been posted (when in fact it has!) so they try again and again and again!
This is why there are so many multiple posts from Russian users.
I'm guessing it's a parsing problem.
Can you investigate and fix it?
Chrome
81.0.4044.117
AndroidOS
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EasyEDA
6.3.53