The new style arrow does that, the zone map will end up where ever the arrow was last. Perhaps Dugi can look in to this a bit more, but I really doubt this can be fixed, but I can be wrong. You can use the old style arrow where they will be at a static location to where you lock them.
Head to the settings Dugi Arrow > Uncheck Icon Arrow.
Nope, after 1 hr of game play following any guide with new style way point enabled, the zone map does randomly stay in the last location where arrow was, no idea how this is caused.