bugs with play with friends

Since there was no update for some month it's unlikely it's a problem caused by the game.

Did you verify the files already? Firewall? Anti virus?

CoenyRW Since last update it takes longer to load chunks on my singleplayer map. I have 32 MB RAM, a I9 processor, but loading needs more time, I mean to fill the chunks with 100 %.

When I play with a friend, the friend has more problems by loading chunks or ping. You share your world on your pc, you share the performance.

The glitches sound strange.

Do you and your brother live in the same household?

If the chunk never loads, it indicates that something possibly interferes with the connection, most likely a firewall or antivirus program. An unstable connection (i.e a high packet loss, e.g. when using wifi) could also be responsible for this.

Please make sure that the game does not get blocked by an av program or firewall (in case of doubt, you can try to disable them and see if this improves the situation). This could be either on your machine or on the machine of your friend.

However, if it just takes very long to load a chunk, it's likely related to the bandwidth (i.e the "throughput") - although if your brother lives in the same household, that shouldn't be that relevant (unless there is packet loss, as mentioned above). If your upload bandwidth is too small, it takes quite a long time until all data is sent to the client. If you're using custom images (which also need to be downloaded by the client), the situation can get worse.

Do you use any plugins? Especially if the plugin adds any assets to the game, they also need to be downloaded which put a high load on your connection (i.e not enough remaining bandwidth to send the chunk data etc).

You could try to join a public multiplayer server and see if you experience the same issues there (this could help to find out if the issue is on your end or your brother's end).

Quote from CoenyRW

yeah, my friend just getting stuck in unloaded chunks but the chunks just do not load anyway by him so he need to rejoin

If the player enters an unloaded chunk, he gets freezed automatically (otherwise he would fall into the void). Usually the game assumes that the chunk will be loaded sooner or later, but alternatively your brother can get out there by using the flying mode (by pressing F2). Another option would be to teleport your brother to you: to do that, open the player list (i), rightclick on your brother's name and select "Teleport player to me"