How to turn off Auto Merge?

To turn off Auto-Merge, open your Task list, scroll to the top, and use the Auto-Merge toggle to switch it off. The toggle is always available whenever Auto-Merge is active; just make sure you're at the top of the Task list to see it.

Depending on your game, you will see automerge instead atop your board with the rest of your events and tasks. In such case, scroll from right to left until you see the Automerge Window and turn off the switch.