over 1 year ago - AndrewT - Direct link
If this is reproducible from a given save file, AND no mods have ever been used in taht galaxy, it is almost certainly a game bug.

But if you have access to a Windows machine you might try it on that - there are occasionally Mac-only bugs.

If that doesn't help, please make a new thread in Bug Reports:
forum.paradoxplaza.com

Stellaris: Bug Reports

Found a bug? Does something seem odd? Share it and it will be investigated! forum.paradoxplaza.com forum.paradoxplaza.com
That's where our QA people gather and qualify bugs to send on to the developers. Please make a detailed report there, and attach any useful save games, dumps, screenshots or other such data.

All the best, and sorry for that problem.