To get back the old-style arrow, go to Settings > Dugi Arrow and disable Icon Arrow.
Once you’ve done that, find the arrow on the screen, drag it into position, and if using Dragonflight, select Edit Mode (ESC > Edit Mode), then check the Grid box.
Once the arrow is in place, right click it while holding down CTRL, then click the Lock Arrow option.
You may need to load up a guide and tick steps until a zone map displays. Repeat the process for the zone map.
There seems to be a bug with the icon arrow.
when the arrow turns into using item like hearthstone it takes the last
position of the icon arrow which then displaces the zone map.
Dugi is looking in to this and a fix will be implemented.
Hope this was helpful.