Before continuing if you are reporting an issue, please ensure that all mods involved are updated to the latest version available, if your issue with with intermod compatibility such mixing C&B bits with other blocks make sure that MCMP is also updated. If your issue is a crash, be sure to include the crash log with your report.

sodium reforged: https://www.curseforge.com/minecraft/mc-mods/sodium-reforged breaks the rendering of chisel and bits blocks

For any bug reports please provide the following details as well,

• MC Version: 1.16.5
• C&B Version: 0.3.4
• Do You have Optifine:no, but I did have sodium reforged

just came here to submit a bug report about this, can confirm

Not related to Chisels and Bits. These are normal block models as far as Minecraft is concerned.
Report to Sodium Reforged.