Interesting that there is no disable zoom, that's always a thing. I don't know how you accidentally Z with the keyboard zoom... i do it sometimes with the mouse wheel but its incredibly rare, I just reset it after.
Every time you do //ffxidb m z- / or z+
it will zoom in or out by 1 "notch". There are some maps however when you do Z+ or Z- and the map completely wigs out. I believe this is what hes referring to
To reproduce the bug at least on my PC, I put the mouse cursor over the minimap, scroll the mouse wheel down so the the map zooms out, then it gets to the furthest point zoomed out and resets back to zoomed completely in but to the point that you could see ants (obviously you cant but you get my point lol). At the point you can continue to scroll the mouse hweel down to zoom out but because its so far zoomed in it takes an annoyingly long time to zoom back out, but it doesnt work going the other way so you can only zoom in to a certain point then it just stops, which is how it should work so why doesnt it work that way zooming out and just stop at certain point.
Why would you be altering the zoom to begin with, set it where you want it and it's good forever
Because some maps are larger and if I'm travelling I like to zoom out so I dont have to keep going into the main game map every few secs to see if I'm heading right, or other reasons such as this.