if you run this bind then look at you Weapon groups, you will see that it now says "Key <None>" instead of "Key 1-6"

/bind # "" (Where "#" == a number between 1 and 6)

https://youtu.be/PiRfJpbx9U4

in the video, i also bind the [5] key (After running above bind) to +shoot2,
given running (/bind 5 "") makes the title now say "None", i tried binding to an aliad names "5", thinking this would rename the "Key <None>" back to "Key 5" it did not.

Edit: (/lua ReloadInterface()) does not fix it, but upon log out/in, the title returns to "Key #"
Edit 2: looking in the wgaf.ini, i found this (bind "5" Missile3), i ran (/bind 5 Missile3) and it returns to "Key 5" from "Key <None>"
I no longer think this is a "bug" necessarily, but i do think that regardless what keys 1-6 are bound to the "key" title should not change.
(I bound ! @ # $ to turrets 1-4, if i changed that to 1-4, then my keys 1-4 change to <None> (But are still functional, when i hit [1] i enter turret 1; when i relog using this, my key still says "<None>"; as of this post, i'm uncertain besides text if this changes anything function wise))

No the key title shouldn't stay the same, it shows you what key to press for this group!
If you bind the group to a different key, you'll see the key for this group -> hence Key <key>. It shows <none> due to the group no longer having a bind on it.

So (/bind k Mine1) will bind k to activate weapons group 6?
(I did not test this, i was under the assumption that if it was not bound where it was meant that it'd show "<None>" if this other way is how it is, then a agree with Xeha and amen!)