Folder names ending with file extension treated as files

Technical information

Using version:

• master (running from GitHub-published source code, currently v2.2.8-pre)
• latest (latest release, currently v2.2.7)

Running on:

• Linux
• Windows
• macOS

How comfortable you are with your system and/or IT in general:

• I'm kind of lost, honestly
• I know what's up, I could help you run some commands or checks
• My machine is fully under my control, tell me what you need
• I attended Defcon last year

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Problem

Folders ending with .js have JS file icon instead of folder icon. See below.