This button in Cachly mirrors how Google Maps and Apple Maps apps work. The first tap on Cachly, and those apps, zoom to your location and start following it. This was done for consistency and intuitiveness of the UI. Changing this now, and having the first tap do something else would likely cause a lot of user frustration since it has functioned this way since Cachly 1.0.
That being said, to exit the first follow mode, you can just move the map and it will bring you back to the default state. Hope this helps at least a little.