Got the same bug in Obi Cloth 6.5.2 and Unity 2019.4.40f1 (LTS), also fixed by changing Layout to "2 by 3"
A comment in there would be nice, I spent an hour or two digging around for null Selections and Meshes or whatever.
Both "Trenchcoat" Obi assets gave me similar bugs. One was in "ObiActorBlueprintEditor" at line 336. currentProperty.OnSceneRepaint(), currentProperty was null. That also seems to be fixed by changing the Layout.
A comment in there would be nice, I spent an hour or two digging around for null Selections and Meshes or whatever.
Both "Trenchcoat" Obi assets gave me similar bugs. One was in "ObiActorBlueprintEditor" at line 336. currentProperty.OnSceneRepaint(), currentProperty was null. That also seems to be fixed by changing the Layout.