Decentraland warns of mobile UI conflicts but never discloses where system controls sit

A developer building a mobile-first Decentraland scene placed interactive buttons at the bottom of the screen following the platform's own guidance, only to find they overlapped with the mobile client's built-in movement and jump controls. The collision caused unintended actions, including phantom entries being permanently written to a database because a user tapping the jump button accidentally triggered an append-only game mechanic instead. Decentraland's documentation does acknowledge that scene UI will conflict with system controls, but does not specify where those controls are positioned on screen. Attempts to shift the buttons upward using percentage-based layouts failed repeatedly, as the platform's controls are rendered in device pixels against a variable safe area that developers cannot directly measure or reference. Because Decentraland does not publish the coordinates or dimensions of its mobile controls, developers are left guessing at values that may only work on one specific device.