@MojangSupport im having problems with lagging severely and this is on my own world and my internet is even bad is it the generation of the caves or is it with block updating but it happens every few minute.

What device/console are you playing on, and is this a single-player world or a Realm? Can you let us know what troubleshooting you've tried so far to help with this issue? One thing you can try is restarting your router and switching to a hardwire connection, if possible. ^FF

I’ve tried restarting my router and full on reinstalling my game and even restarted the device and it still had lag issues, please tell me if there is any other things that may be the problem even when I used older version it didn’t have a problem could it be world generation?

Have you checked your Firewall/Antivirus settings? This might be causing the issue with connecting to the server. Also, it may help to switch to a hardwire connection instead of WiFi. Let us know if this helps or if you're still having any connection issues. ^BT

Yes I have looked through this and no this is on bedrock with on PlayStation I’m just wondering if it’s just the chunk generation with the height or something like that.