[Bug]: Client blocks appearing in servers

[Vitalskink7]

What happened?

I made a mc server with the plugin tuffx and viaversion's plugins, but i noticed that when i enabled via-blocks mod and in plugin, for some reason by just walking randomly you sometimes hit invisible blocks that are light blocks and you have to punch them for them to dissapear and also in a plugin like grief prevention it can also generate client side blocks. and people keep getting reported for flying inside claims because they stand in the client-side blocks

How to Reproduce

1. A server (i use 1.21.11) with all tuffx viaversion viabackwards and viarewind and grief prevention plugin
2. make a player do a claim
3. another player to place a block inside the created claim (has to be one of the translated blocks. like netherite block or copper block, make sure to have via-blocks enabled)

Version(s)

1.1UT15

Agreements

• I have checked the pinned issue(s), including the one called 'READ FIRST', if this issue has been explained
• I have searched previous issues to see if this bug has already been reported
• I have ignored this and checked all the boxes
• I have given all the information I can to help the developers understand/reproduce this bug
• I have reported only one bug in this issue

[UplandJacob]

Are there any other blocks besides light blocks that this happens? I think I’ll have this fixed for UT16, but I need to test whatever blocks you are having issues with.

I can’t promise all of the hitboxes will match exactly though such as dripstone because they have a random offset.

[Vitalskink7]

well only light block happens randomly, it only affects other blocks when the server dosent allow them to exist like my grief prevention example, but for that it only affects any blocks that do not exist in 1.12.2, tnx for the suport :)