How do you know that Simlink is causing this? What steps have you taken so far to make you come to this conclusion? We are currently not aware of any stuttering issues, but this could of course be something new!
I trust that you looked for similar topics before creating a new one? Such as this one?
Make sure that you are using the latest Simlink version, and that you have completely reinstalled the Simlink plugins since then. You can make sure that this is the case by following these steps:
Switch to the “Plugin status” tab
Press the “Plugin settings” button
Find the entry for X-Plane 12 and press “Uninstall Simlink”