icons setting in core.concealer module does not override / combine with icon_preset setting

[dasupradyumna]

Prerequisites

• I am using the latest stable release of Neovim
• I am using the latest version of the plugin

Neovim Version

NVIM v0.10.0-dev

Neorg setup

require('neorg').setup {
  load = {
    ['core.defaults'] = {},
    ['core.concealer'] = {
      config = {
        -- icon_preset = 'diamond',
        -- BUG: preset+override not working?
        icons = {
          heading = {
            level_1 = { icon = '❖' },
            level_2 = { icon = ' ◈' },
            level_3 = { icon = '  ◇' },
            level_4 = { icon = '   ⋄' },
            level_5 = { icon = '    ⟡' },
            level_6 = { enabled = false },
          },
        },
      },
    },
    ['core.dirman'] = { config = { workspaces = { journal = '~/journal' } } },
  },
}

Actual behavior

I only wished to change the header icons while the icon_preset is set to "diamond". But if I set the icon_preset, the icon settings are ignored; and if i remove the icon_preset, the icon settings work but remaining icons belong to the "basic" preset.
Only the level_6 = { enabled = false } takes effect (heading 6 gets disabled), but other icons are still fetched from "basic".

Is this intended behavior?

Expected behavior

I thought the setting the icon_preset and configuring icons would merge both settings, i.e getting "diamond" icons by default but only override the header icons.

Steps to reproduce

Just open a norg file in NeoVim.

Potentially conflicting plugins

None

Other information

No response

Help

None

Implementation help

No response