[Investigating] "Network Error" when a building completes on screen

ElfNeedsFood

Frequently when upgrading buildings, I'll get a "Network Error" and a game restart when a building completes on screen, both when naturally counting down and when accelerating the build with build cards. 

The game then resets and there is often a short timer of less than a minute before the building actually completes.

This is happening in version 1.1.1.

//Edited Title -Brigby