In case you missed it, Autodesk released update 2018.1.2 for AutoCAD a couple weeks ago. Click here to see a listing of the issues fixed in this and previous updates for AutoCAD 2018,
To download and install the update, refresh your Autodesk Desktop App and updates should appear if you have an active subscription (maintenance plan or annual subscription). The Autodesk Desktop App icon is located in your Windows System Tray if it was installed.
You can also access them from the Product Downloads section of the Autodesk Accounts portal if you are a contract manager or software coordinator in your account.