game hangs at start of round

**Describe the bug**
In lastest vanilla Civ6 (no other mods besides CQUI steam-version) the game just happened to freeze. Music is still playing, but no user interaction is possible. If I load the savegame without CQUI, it works like a charm, but with CQUI enabled I need to kill the game via task manager as it's impossible to interact with the game by any means.

**To Reproduce**
Load the attached savegame... voilà ;).

**Expected behavior**
The game still working.

**General informations**
- OS: Windows 10
- Version: latest
- Expansion: none
- Other mods: none

**Save game and logs**
[civ6hanging.zip](https://github.com/Azurency/CQUI_Community-Edition/files/2379239/civ6hanging.

Start by loading the attached civ6hanging.zip save with CQUI enabled, then compare the same save without CQUI as described. Inspect the available logs for the point where the game stops responding; done means the save reaches the start of the round and remains interactive with CQUI enabled.

Written by the indexing model from the issue text.