Thank you for the save and report. I will pass it along to the team, but since sometimes this issue does not reproducing after reloading, could I ask you to go to "Documents/Endless Space 2/Temporary files" and share the diagnostics file of the time this happened. It will possibly be very large, so I recommend compressing it first.

Certainly, here is a diagnostics file I saved after hitting the End Turn button, while the "Pending" message is flashing. If needed, I can also save another one before I hit the End Turn button.

Thank you for looking at this.

Diagnostics - 2019'09'20 @0912'28''.html