Not sure what is causing this particular issue now but I do remember playing this not that long ago without trouble. Basically, if I connect to my MP server and go straight into a cube with TE machines the textures will be there. If I preview the cube though the textures will be missing, this also persists if I go into the cube then. All blocks still function and even show the current upgrade status by the color corners. If I do a force reload on textures they will return but other modded machines will then have server graphic issues (missing pieces, wrong textures).

I think I may rollback the version of CM to 1.12.2-3.0.11-b207 and see if the issue persists.

Compact Machines version: 1.12.2-3.0.12-b215
Forge version: 14.23.4.2745
I am not using Optifine: true, I am not using optifine
Currently using the latest TE mods as well.

This is also happening for me. I keep accidentally previewing the machines before entering them. Is it possible to disable the preview feature entirely? If not, could we get that added as a workaround for this while we wait for a proper fix?

I made a pull request for this, #375

It adds a configurable option to disable the rendering if desired, until a proper fix can be implemented.

This should be fixed in 3.0.14.

Downgrading to 1.12.2-3.0.11-b207 had no effect, still missing textures.

Can confirm this.

Can also confirm this. it seems to have happened to me only after checking the Preview of the inside of the machine. Beforehand checking that I didn't have that texture problem.

Re-opening the game and not looking at the preview before entering solved the problem.