Aeon Timeline 3.0.12 has been released for Mac and Windows. An iOS release for 3.0.12 will be coming shortly, but has been temporarily held up by a slow Apple review process.
Most significantly on Desktop, this update fixes a number of issues related to Scrivener syncing.
You can read full details of the release here:
Performance Updates Next Week
We have also been investigating some of the performance issues associated with large files on this device, and will have an update ready early next week which will address the most significant bottlenecks.