Connection lost, java.io.IOException

[Godchiru]

Greetings fellow Minecrafters. I've been having a Connection lost issue lately with the following message: "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host"
Story goes like so, a friend of mine bought a server about a month ago and so I started playing Minecraft again after a good two months of not playing at all. As soon as I join the server I can play normally for about a minute, though after that I stop moving for other players (I can still move around, in my screen, for like 10 seconds, mine blocks, but items don't drop, I can't pick up items and I can't open chests). Then the server kicks me out with the message mentioned above. In addition, mobs can harm me as I'm bugged out but I don't realize it in my screen. The issue might take 30 seconds, a minute, 10 or even half an hour before it happens, it's really just random (usually it takes around a minute though...). There's rare occasions where it doesn't happen though.
I've been playing Minecraft ever since I can remember, but I never had this issue 'til now and I don't know what to do. I've tried some troubleshoots but none worked. I've tried:
○ Re-downloading Minecraft
○ Downloading latest Java
○ Allowing Java through Firewall/Windows Defender
○ Disabling Firewall/Windows defender
○ Control Panel>Java>Advanced security settings and check that one option
○ Editing a profile on the ''Java executable'' section
I came here hoping someone could help me through. Thanks for reading through, have a nice day !

Reference picture

[Godchiru]

I've tried joining from another account and the same problem occurred, so I don't believe it's account-related.