For some context, I run a modded 1.16.5 forge server on my PC for me and two of my friend. We are experiencing an issue where if you disconnect from the server and attempt to reconnect to the server without restarting the game the "Incomplete set of tags received from server" error appears. This wouldn't be a huge problem because most of the time when you are disconnecting you are quitting the game anyways, but one of my friends doesn't have the greatest internet and every so often he gets disconnected randomly, and then he has to restart his game every time. I know the incomplete set of tags thing generally means that you don't have all the right mods for the server, but that doesn't explain why you can join once, and then when you try connecting again it doesn't work. If anyone has any idea what the problem is and knows how to fix it, any help would be great. I can also provide log files if anyone needs them.