When loading a multiplayer game in fullscreen on one monitor, which takes some time, focusing another application on another monitor crashes factorio when the map is loaded in agui::Widget::getWidgetUnderMouse. Log attached.

Attached a copy of our save.

As mentioned before, we seem to be able of reproducing the problem by running around with exoskeletons or driving around a car (with rocket fuel). With lots of bots and requests, some requester and a buffer chest (near the big station to the right of the base), it ...

We just updated to 0.16.11, and just had another crash three minutes in. Same errors in the log (log generated by 0.16.11 attached).

Before the 0.16.11 update, we tried it in single player and it didn't crash there.

We're getting the same issue since 16.10 (Steam, both on Mac and Windows machines). It seems to be limited to multiplayer here as well (on lan).

Our theory is that it happens when a player is moving quickly. Either with lots of exoskeletons (6+), or when in a fast vehicle. Based on the log perhaps ...