Hi, this is a weird one! There is a "child spectre" slowly eating through all the buildings in my village. I can select it, but cannot "grab" it (the grab seems to "fall through" to whatever is "beneath" the spectre). Furthermore, towers and villagers cannot see the spectre and so do not attack it. A restart with or without an AI reset has no effect.
Details:
MacBook Pro
16G RAM
CPU: 3.1 GHz Intel Core i7
GPU: Radeon Pro 560 4096 MB
OS X 10.13.6
Java Version 8 update 201 (build 1.8.0_201-b09)
Any help or advice greatly appreciated, thanks for the fantastic game!