"There's an auto-correct punctation bug when using quotes.".

Hi - I’ve suffered an auto-correct bug since I first purchased Scrivener, and it continues to plague v1.2.

When I type this…

“I’m happy.” She adjusted her hat.

…the auto-correct provides an extra period after the quotation marks. It auto-corrects to:

“I’m happy.”. She adjusted her hat.

Is there a way for me to fix this, or is it a bug? It’s tedious erasing all the extra periods after quotes without dialogue tags, and sometimes auto-correct sneaks them back in there.