TinkerCAD - Disappearing planes.

[ChalkLine]

I'm detailing an object in TinkerCAD when suddenly parts of the MG mantlet on my cupola disappear. It was similar to the semi-circular ejection chute before this.
Does anyone know why it does this?

[ChalkLine]

I just found the answer, I'll leave this here for others.

Depending on your connection an object can be too complex for the Autodesk servers. I'm using a rural connection and it probably lagged or something causing the servers to overload and corrupt the model.

If you get this error immediately use the back button before it showed up and the object might be okay. If you have left the session the model is corrupted and you either have to see if you can fix it or start again. I'd recommend constantly exporting your model as backups.

[Mig Eater]

That's why I dont like using cloud based/web services, If there is a problem with the internet connection or the server has an issue you could lose everything Its much more stable to do the work locally on your PC were you can have more control over what you are doing IMO.