Any chunk that has connected glass will break.
Only happens if I have sodium with indium and connected-block-textures.
Running with only connected-block-textures or only sodium works fine.

Using the 1.17 fork https://github.com/lochoko/connected-block-textures
Running on 1.17.1

What version of c2me? Does it happen without c2me? And what's your config?

Using c2me-fabric-mc1.17.1-0.2.0+alpha.1.38-all
Works fine without c2me
I havent touched the config so its still the default values

Does this happen with only fabric-api, connected-block-textures and c2me?

No, having only fabric-api, connected-block-textures and c2me it works.
As well if I only use fabric-api, sodium, indium and c2me it also works.
Using fabric-api, sodium, indium and connected-block-textures without c2me also works.
Only if I have all those mods, fabric-api, sodium, indium, connected-block-textures and c2me does the chunks mess up.

Not sure if c2me is causing it, just thought I'd start trying here

Not reproducable with i5-7300U and Intel(R) HD Graphics 620 with the following list:

Ah my bad, didn't see that indium had updated. indium-1.0.0+rev.beb4972.jar fixed it.