Thank you so much! That resolved the issue!

I to add more context: I may have saved the game on my laptop, synced to the Steam cloud, then loaded on my desktop. I wonder if that hardware difference caused this issue.

More on this:
Placing down a radar and viewing the egg from map view does not trigger crash.
It seems to be the players proximity to the egg that causes the crash.

Crash when pentapod egg is about to display on screen.
Or possibly when new terrane is about to load from fog of war.

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I am unsure how to post the crash dump or save file to this form. Uploaded to Google Drive ...