Duplicating File Type Group corrupts context menu item names

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1

I don't know whether this is 13 beta behaviour or whether it applies to 12 as well, but:

I needed to create a new File Type Group very similar to an existing one I have, so I decided to use the duplicate function to make it. The duplicate was created correctly but I noticed that a lot of context menu items I had were renamed in weird ways. All whitespace was also converted to underscores, which was a bit unsightly. Attached are some images of the duplicate (above) and the original (below)

Clipboard Image (1)
Clipboard Image (1)864×1018 93.3 KB

Clipboard Image
Clipboard Image908×1051 93 KB

Any ideas as to what might be causing this?

2

Just so it's not missed, the most notable corruption seems to be the omission of everything preceding a forward slash as seen in the lower left corner. I have no idea why the upper menu items in the center right are changed as they are, especially "Map channels" being changed to "Process - Stereo".