I don't know if this is a bug or not, but it is horribly annoying enough to be considered a bug.
The Germs are spreading through sandstone tiles so my Duplicants are constantly disinfecting every 30 seconds the wall tiles next to a slime biome.
Save file attached.
Steps to Reproduce
Build tiles next to slime biome. View Save file - watch constant cycling of disinfection of same tiles.
This issue has not been confirmed by a developer yet.