Unity generating overlapping lightmap UVs

I get the following warning in Unity 2018.1.0b13 (and b12 before it, and possibly earlier) for every mesh in the scene. All the meshes have Generate Lightmap UVs enabled, and this happens with new projects with no project configuration changes.

There are 3 objects in the Scene with overlapping UV's. Please see the details list below or use the 'UV Overlap' visualisation mode in the Scene View or Object Maps for more information.

- Torus: 129 texels
- Cube: 96 texels
- Icosphere: 68 texels

There's this thread on the subject elsewhere on the forum also: https://forum.unity.com/threads/overlapping-generated-lightmap-uvs.522747/

 

If you believe you found an issue in Unity, the more efficient way is to report it following these guidelines:

How To Report Bugs
https://unity3d.com/unity/qa/bug-reporting

A Guide to Being an Effective Beta Tester
https://unity3d.com/unity/beta/guide-to-beta-testing

Spoiler: Full version

Using the bug-reporter seems to be an important step, because it makes sure the report is in Unity Technologies bug-tracking pipeline, has to be processed at some point. Using the forum is often used to add to a little more attention to a bug-report, but does not replace submitting the bug-report.

It's from advantage to attach a project to the bug-report that UT can use to reproduce the issue and test their fix against. Attaching a video to the bug-report that shows how to reproduce the issue and the issue itself, has been proven useful too.

The easier an issue can be reproduced by QA, the more likely it is to get forwarded to a developer, who might or might not work on a bug-fix for that at some point.

After you submitted the bug-report, you receive a confirmation email with a Case number. UT often asks us to post the Case number in the forum thread, which allows them to find that bug-report if they look at your post.

Following these steps will increase the chance that UT is looking at your issue tremendously.

According to the other thread you linked to, this issue does not seem to be new to 2018 beta?

https://forum.unity.com/threads/welcome-to-the-2018-1-beta-forum-forum-guidelines-inside.511835/