Weird Display Bug?

Second post attempt, think I got auto logged out while typing.
Hit post & lost everything

TLDR

File
https://www.nexusmods.com/skyrimspecialedition/m ods/96582?tab=files&file_id=443396

Extract Contents then Drag n Drop the folders to AR v4.01

Pic
https://mega.nz/file/jaZWVCJD#LR4aqdPkQxtudC1snX zecGzzRYUjlwdvZeZlY-B4U9c

Issue Display of Folders incorrect for certain folders, differences. seen listed

Single Decimal point
AR takes as "Extension", but appends that extension to the full filename

Second edit, I had noticed That check for updates was unticked, reset that & mamually checked using Help > About > Checck for Updates
Was informed incorrectly that I had latest version, Now aware of that I tested again.

AR v4.03
Same behavior seen, so the issues still there.

Two Or more decimal points negates the issue.
Remame doesn't display the issue even with no renaming applied.

Appears to just affect displayed names not function (Unverified assumption).