Welcome to the AFK Mods bug tracker. In order to report an issue, you need to have a VALIDATED account to post one. Once you have followed the link the registration email sent you, please select a project from the drop down menu below. Select “Open New Issue” and fill out the form with as many details as possible.
This was originally reported in a placed ref ticket (Issue #23241). I was able to confirm the problem. The particular mesh is very large, but Arthmoor said that we have done fixes for other "megameshes" like it in the past.
It should be rather obvious where the gap is from the screenshot I linked. It's not a huge gap but it is noticeable if you look close enough.