Location of icon on maps and apps

[+Deepdiggingmole]

The very first Ad Lab I did I have recently discovered that the initial icon for an Ad Lab (which I placed 3 years ago) is now hiding another icon for a cache that it related to.
Originally Ad Labs did not appear on any other maps,  they were separate to the Ad Lab App and so the fact that i used the same co-ords wasn't an issue - now that they are interlinked I am having to move the icon.

So i have gone onto the Ad Lab editing page and done this 

My question is does anyone know how long it takes for the re-positioning to show up on the maps / apps 

I changed it half an hour ago and yet on the Ad Lap App - th e icon hasnt moved.  

[+Max and 99]

It changes immediately.