The siege shrine bug
Windows 10 Home 64-bit
Intel Core i7 6700HQ @ 2.60GHz 41 °C
Skylake 14nm Technology
32.0GB Dual-Channel Unknown @ 1197MHz (17-17-17-39)
Alienware 0FG0DK (U3E1)
Generic PnP Monitor (1920x1080@60Hz)
Intel HD Graphics 530 (Dell)
NVIDIA GeForce GTX 1070 (Dell) 45 °C
ForceWare version: 378.66
931GB Hitachi HGST HTS721010A9E630 (SATA) 42 °C
No optical disk drives detected
It is possible to possess the power of siege shrines without having them, allowing me to mine through enemy fortified walls as though they are nothing.
1 - Play a skirmish/scenario map which has siege shrines, and complete it. Preferably, use this one, because it is the one which I used to replicate it reliably:
2 - Play any map/game, including multiplayer/official campaign. You can now mine through any Empire/player wall as though you still have the siege shrines, even though you do not.
You must not close the game at any point otherwise it resets. It is possible that this only works on workshop maps, and that it requires either a specific number of siege shrines, such as three, or completion of the level.
Output log, even though it is easy to replicate: