"Pressing return on avatar attachment" setting not behaving as expected

[AtlasLinden]

Environment

Maint C 7.1.12.12258017789

Description

No differences spotted upon attempting to attach objects to avatar when changing the "Pressing return on avatar attachment" inventory setting.
In the following clip, an attempt to add two right attachments is made using both drop down options.
https://gyazo.com/253fe5627afb52159d7a44f2fdcc18b6

Reproduction steps

Verify that the "Pressing return on avatar attachment" inventory drop down options perform the correct actions.
That is, add an attachment to a point that already has an attachment when "Adds attachment (recommended)" is selected.
And replace an attachment if one already exists at that point when "Wear (removes attachment at that point)" is selected.

[maxim-productengine]

So currently this setting works correctly in Gallery view. And it's completely ignored in List view.