Flat land always floods
When I build on flat land it always floods and turns to earth land
I was doing some wireshark traces and it looks to me like an incorrect sequence number in the ACK is what causes the server to stop sending packets, but I have not really spent time working with TCP in 10 years.
My son was complaining about this yesterday and I spent a couple hours looking into it. Removing K9 did stop the disconnects. I reinstalled K9 (version 4.3.188) and I didn't get any disconnects. Then K9 upgraded itself to version 4.4.268 and after reboot the problem returned. Hope this helps.
The same exact thing is happening to my Minecraft. I thought it was an antivirus like Mcafee that was causing the issue but it isn't. But I use windows 7 instead of windows 10.