Scattered connection resets are normal
What it looks like in your log
Internal Exception: java.io.IOException: Connection reset by peer
What causes it
Individual "Connection reset", "Broken pipe" and "forcibly closed" lines are players dropping their own connections: home wifi, launcher closed, mobile hotspots.
How to fix it
Nothing, unless every player disconnects at the same moment; simultaneous resets point at the machine or network, not the players.
Not sure this is your problem? Paste your log and Roastd will tell you which of these it actually matched, and what else it found.
Check your own log