We've installed ArcMap v10.8.2 along with the patched extensions at the same version: Roads and Highways, Data Reviewer and Workflow Manager (all had v10.8.2 patches). However, the other desktop extensions within the exact same ArcMap environment say that they are at v10.9.1 and when you inquire about the version using arcpy, it says v10.9.1 despite the GUI clearly saying v10.8.2 (Menu -> Help -> About ArcMap). Furthermore, a fresh install of ArcMap v10.8.2 is unable to occur on a machine with ArcGIS Server v10.8.1, yet an in-place upgrade of ArcMap v10.8.1 -> ArcMap v10.8.2 will proceed fine.
Are these software bugs?