Skirmish replay desyncs sometimes when autosaves happen

[KJeff01]

Describe the bug
As I was watching my replay against the "dumb20" bot I saw it desynced at 10:00. I encountered this one some months ago watching a replay of me with some teamed Cobras against other Cobras on a 3v3 Julia map.

To Reproduce
Play a skirmish long enough to cause an autosave. Every autosave may or may not cause a desync.

Expected behavior
Don't desync.

Your System:

• OS: Ubuntu MATE 24.04
• Game version: many releases, master

Additional context
Pastdue at one point said this happens from "slow saving" (like if using a HDD), and the game should probably be paused while an autosave happens to avoid this.