Hello! Many thanks in advance for any help anyone can offer on this issue. I've been using copy/paste without issues on dozens of buildings. However now I think I've created a building too large for copypaste? I'm not sure what else is the issue. I've not edited nor touched the files of the plugin nor the config since first installing. 

This is the base being copied. Tried copying it a dozen different ways from a dozen different locations.

For reference, this is the interior. There's not really any objects other than a few lights and a battery, but I even tried it with those things deleted to rule them out. The entire things is mostly just HQ walls and frames up to maximum possible default stability.

Here is how the structure pastes. Again I tested this extensively before coming here, pasting with "stability false" and true alike, changing any option I could, trying varying heights and paste locations. Each attempt the result is the same, half the structure goes missing (with varying heights at different walls oddly, and only on the internal side). I never encounter any errors in-game or in my rcon-console. 

Again, I'm stuck, so any/all help is appreciated.

hey, tried pasting with stability disabled or such?

Yes. I stated in my last paragraph that I had tested every possible method of copy and pasting I could come up with, including many variations with stability false and true. I generally like to solve a problem on my own, but this is one case where after hours of testing I couldn't come up with a solution. I even went so far as to download a plugin that allows for infinite stability (I could build up to the sky in my test), but that did not seem to affect the copy/paste. 

The first layer inside the base only pasts two walls high, making it even more confusing, as that couldn't possibly be a stability issue after only two walls up. It's like it's getting stuck copying, and so the full base isn't in the file and that's why it think's it's pasted it successfully. 

Are there any errors in console and could you show the datafile for it?