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.

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

• MC Version:
• C&B Version:
• Do You have Optifine:

no optifine because it was known to crash before:
MC 1.16.5
C&B Release 0.3.4

so I just tested without optifine because it crashed before. and so I have other mods: but no chisel blocks show. no vanilla, no fluid, no modded. I will test with optifine to see, and to double check if all mods are updated to latest. but it is up to date as of a few days to a week ago.
but so I tried bagging water and it won't load moddel of chiseled bit.
I may not know if other's are faing this too or what.