EDIT (31 May 14:10 GMT+0): We have now released a new update (1.12.6) which should fix this issue. Please update your game!

EDIT (30 May 12:40 GMT+0): This issue will be fixed in the extra update we are hoping to release by tomorrow!

EDIT (30 May 11:40 GMT+0): We have found out that the issue is related to the Alliance Wars: 0 Points for Battle. 

There is a known issue in the new update (1.12.5) with Delilah and Thoth-Amun Minions not causing damage.

We are aware of the problem and are currently working on a fix. Our apologies for the inconvenience!