I’ve seen a couple mentions of the App freezing during the AI turn since the August 1, 2019 update. I apologize for this problem as it sounds incredibly frustrating. I am currently searching for the possible source of this issue as I have not been able to personally observe it. If anyone has any information as to how to replicate any such issues, please send us an email at firstname.lastname@example.org or post to the support forum thread that I’ve created for this issue.
Again, I will be searching for this issue and hope to resolve it as soon as I can identify it and root out the cause. Thanks for your patience, understanding, and assistance. And thank you for playing!