Systray gets some unwanted margin with a base size too big

[Vermoot]

Output of awesome --version:

awesome v4.3-1539-gb16f62862 (Too long)
 • Compiled against Lua 5.4.4 (running with 0.9.2)
 • API level: 4
 • D-Bus support: yes
 • xcb-errors support: no
 • execinfo support: yes
 • xcb-randr version: 1.6
 • LGI version: /usr/share/lua/5.4/lgi/version.lua
 • Transparency enabled: yes
 • Custom search paths: no

How to reproduce the issue:

Setting up a systray for my bar, I've had a weird issue with it having some unwanted, inconsistend margin depending on how many icons were in it.
Here's the code I ran:

local systray = wibox.widget.systray()
local systray_widget = wibox.widget {
    {
        systray,
        margins = 2,
        widget = wibox.container.margin
    },
    widget = wibox.container.background,
    bg = "#665c54",
    shape = function(cr, width, height)
        gears.shape.rounded_rect(cr, width, height, 5)
    end,
}
systray:set_horizontal(false)
systray:set_base_size(24)
beautiful.bg_systray = "#aa0000"
beautiful.systray_icon_spacing = 4

The systray background color is here to visualize where it is exactly.

Here's what it looks like with 2 icons only:

And here's what it looks like with 4:

As you can see there's a bottom margin that's different on those, and what's more the margin isn't red.

I asked about it on Discord and been advised to remove systray:set_base_size(24), which did fix the issue. Now I have consistent margins no matter how many icons I have in the systray, everything is working as expected.

Crylia on discord who's helped me with this said:

you basically made every icon have 24x24 space. But since you added a margin to every icon it overflew into the above. (just a guess)

I'm reporting this on here as asked by @Aire-One, because they believe this to be a bug that should be fixed.