Loading Terrain (client side) sometimes fail to render correctly

[GunsForGuns34]

In my game I load terrain client sided using a custom system to save and load it (included in private message). Besides the lag from JsonDecode it works almost perfectly. I say almost as roblox seems to not render parts correctly from time to time. It seems kinda random, and can happen to any map in my game that contains terrain.

Collisions seem to work fine, it’s just the rendering of the terrain that seems to not work.

And as stated before it seems totally random, here is the same location, but this time loading the world had no issues

System Information:
Os: Windows 10 Pro
CPU: Intel(R) Core™ i5-7600K CPU @ 3.80GHz
Memory: 32GB
GPU: Nvidia GeForce GTX 1070

Expected behavior

I would love to see this get patched so terrain can be loaded and rendered correctly on the client like this without weird issues and holes in the terrain.

A private message is associated with this bug report

[m0bsterlobster (mobsterlobster)]

Thank you for reporting this. Unfortunately, we can’t commit to checking custom systems - if there is a way to repro this issue with Roblox’s default replication / loading system, then we’d be happy to take a look. I’ll close this bug for now, but feel free to message here if you are able to repro it using Roblox’s native systems.

[GunsForGuns34]

Would simply a script that fills chunks using :WriteVoxels() on the client work? That is basically all my “custom” system does, however I can definitely try and simplify it. Unless, using :WriteVoxels() on the client is like not really supported?